Deceleration Equation Physics

Motion with variable acceleration is quite complicated. Chapter 10 Velocity, Acceleration, and Calculus The first derivative of position is velocity, and the second derivative is acceleration. For instance, imagine you're a drag racer. , Dallas, TX. Calculate acceleration given initial time, initial velocity, final time, and final velocity. The Equation of Motion of Uniformly Accelerated Motion: For motion along a straight line and at constant acceleration, a, the equation of motion has the form: The proof of the above equation will be given and discussed later. Deceleration injury can occur in high-speed vehicles when they stop or slow down abruptly or when the occupants of the vehicle are propelled. A-B = motion at constant acceleration, B-C = motion at constant velocity, C-D = motion at constant deceleration. Enter 50 in the time box and choose seconds from its menu. 800 seconds. s = displacement u = initial velocity v = final velocity. Synonyms for deceleration in Free Thesaurus. This is followed by the usual numbers in, answer out. In this case we can see that the equation we want is. net If an object is moving at a constant speed, it means it has the same increase in distance in a given time:. If the cylinder starts from rest, and rolls down the slope a vertical distance , then its gravitational potential energy decreases by , where is the mass of the cylinder. One formula to calculate deceleration is a = (v - u)/t, where a is the deceleration, v is the final velocity, u is initial velocity and t is the time taken. Copyright © 2008 Laying the Foundation®, Inc. Physics - Concepts - Velocity and Acceleration. Physics Documents. 2 synonyms for deceleration: retardation, slowing. These links will take you to a page which you can print if you want to so that you can revise these. How do I calculate the kynetic energy in Learn more about matlab. You speed up if the acceleration and velocity point in the same direction. A plane decelerates, or slows down, as it comes in for landing in St. Write down the three equations of motion every time. 67 m s^-1 I know the final speed of the lorry, u = 48 km h^-1 = 13. Variable & Control. Let's also assume my maximum deceleration speed is $10~\text{m/s}^2$. Shodor > Interactivate > Discussions > Graphing Time, Distance, Velocity and Acceleration Note: This discussion is based on the Gathering Information from Graphs Discussion. Kinematics is the science of describing the motion of objects. • When knowing L2 value, be careful to calculate lfrom ~2l(l+1), two solutions. The only acceleration acting horizontally is deceleration due to air friction, this is often ignored and it is considered that there is no horizontal acceleration whatsoever. Acceleration due to gravity where air resistance is negligible is independent of mass and surface area. Four shots were conducted at nearly identical conditions: impact velocities of 320 to 360 m/s. Negative acceleration, however, is acceleration in the negative direction in the chosen coordinate system. Home; web; books; video; audio; software; images; Toggle navigation. In physics, tension is the force exerted by a rope, string, cable, or similar object on one or more objects. O Level Physics: Kinematics. Deceleration brings stuff together. Motion in one dimension under constant velocity or constant acceleration: deriving the equations from the definitions of velocity and acceleration. This function computes the average acceleration of a moving object, given the initial and final velocities, and also the total time spent. Physics for the 21st century. A-B = motion at constant acceleration, B-C = motion at constant velocity, C-D = motion at constant deceleration. But the deceleration is not constant. There is no formula for deceleration is physics so you can use the same formula for acceleration - use the answer in the negative. Acceleration is a vector, which means that it has to be reported as a magnitude with a direction. It is found that the unsteady Navier–Stokes equations admit similarity solutions which depend on a nondimensional parameter S =α/Ω0, measuring unsteadiness. After all, acceleration is one of the building blocks of physics. Deceleration also known as the negative acceleration. The maximum deceleration of the train is 0. I'm doing a racing game and I need something to limit the speed and thinking about applying drag. Please try again later. For some reason your suggested change could not be submitted. Assuming the bullet's deceleration to be constant, what is its magnitude? We have just learned this so im not sure how to really do this. It will also help to have if equations are permitted on tests!. Free physics student portal for online learning equations of motion quiz questions, MCQs to find questions answers based online learning tests. the most important principle in physics, is the working principle of or deceleration in accordance. So, Texas wants to raise the speed limit to 85 mph. To discuss a newtonian physics model for understanding and calculating acceleration-deceleration forces found in sport-related cerebral concussions and to describe potential applications of this formula, including (1) an attempt to measure the forces applied to the brain during acceleration. deceleration synonyms, deceleration pronunciation, deceleration translation, English dictionary definition of deceleration. In order for you to understand how we found these equations, it is important to understand speed, acceleration, free fall, and acceleration due to gravity. There are analogs of equations of motion in other areas of physics, for collections of. In part a, we have rubber from the car tires on dry concrete for a coefficient of static friction of 1. Assuming uniform deceleration of this value, calculate the distance over which the front end of the car must be designed to collapse if a crash being the car to rest from 100 km/h. Compare the theoretical prediction with your results for the acceleration. A standard 4. The average acceleration of a body given in the above equation is a during time t. Test your knowledge of how to calculate deceleration using this interactive quiz. An object decelerates when is getting slower, its velocity is decreasing. PHYSICS FORM 4 [FORCE AND MOTION-CHAPTER 2] 8 Equations of Liner Motion with Uniform Acceleration For an object in linear motion with uniform acceleration, problems involving the displacement, velocity, acceleration and time of motion can be solve by using the equation of motion. Free physics student portal for online learning equations of motion quiz questions, MCQs to find questions answers based online learning tests. There are no other forces acting on the bullet. What is the meaning. the most important principle in physics, is the working principle of or deceleration in accordance. com prepared by subject expert teachers. This chapter of The Physics Classroom Tutorial explores each of these representations of motion using informative graphics, a systematic approach, and an easy-to-understand language. Acceleration Solved Examples. List only the quantities given in the problem and state the new unknown. – The equation of the motion of the marble at tip(x), from which we can get important information. The acceleration formula is one of the basic equations in physics, something you'll want to make sure you study and practice. Special relativity gives a completely self-consistent description of the mechanics of accelerating bodies neglecting gravitation, just as newtonian mechanics does. One formula to calculate deceleration is a = (v - u)/t, where a is the deceleration, v is the final velocity, u is initial velocity and t is the time taken. The average acceleration of a body given in the above equation is a during time t. If the problem tells you any three of these quantities, you can use this equation to find the fourth, as shown in the examples below. Strong science reasoning may negate the need to memorize. If the rate of change of velocity during all these intervals remains constant then the acceleration a also remains constant. Calculated rates of deceleration can be expressed in units of standard earth gravity (G's). The only force that acts on the car is the sudden deceleration from v to 0 velocity in a brief period of time, due to the collision with another object. In order for you to understand how we found these equations, it is important to understand speed, acceleration, free fall, and acceleration due to gravity. calculate the upward thrust to decellerate the craft ts initial downward velocity to zero as it lands. From Calculus I we know that given the position function of an object that the velocity of the object is the first derivative of the position function and the acceleration of the object is the second derivative of the position function. This chapter of The Physics Classroom Tutorial explores each of these representations of motion using informative graphics, a systematic approach, and an easy-to-understand language. 8 ms −2? (HINT: When the ball is at its highest point, it is momentarily at rest and v will be 0 ms −1. io resources, for AP Physics 1 & 2, reported a 9. The deceleration of an objects is a measurement of its rate of change of velocity as it slows down. I'm doing a racing game and I need something to limit the speed and thinking about applying drag. Note that the more common term, Speed, is a velocity without a direction, so that 30 miles per hour or 20 meters per second are speeds, and not velocities, since no direction is specified. The Equation of Motion of Uniformly Accelerated Motion: For motion along a straight line and at constant acceleration, a, the equation of motion has the form: The proof of the above equation will be given and discussed later. For the purposes of this project you don't need to fully understand the equations, you just need to understand it enough to use it. The deceleration is then calculated from the formula a ˘ u 2 2 d. Calculating angular deceleration By adriansnetlis , March 23, 2016 in Math and Physics This topic is 1299 days old which is more than the 365 day threshold we allow for new replies. At this level of physics, we only deal with constant or average acceleration, so all acceleration equations assume that we are finding the average acceleration or that the acceleration is remaining constant. Deceleration A lorry driver brakes hard, and slows from 25 m/s to 5 m/s in 5 seconds. A Sample Physics Problem Dan Styer, Oberlin College Physics Department (Dan. General physics 1. A list of physics formulas available at your disposable courtesy of Examville Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The work done W by a force F on an object is given by the equation. Time (During braking operations) 72 32 (20, 21) Velocity (m/s) Time (s) (0, 0) E. GCSE Physics (8463) 1. For instance, imagine you’re a drag racer. Calculate the velocity of an object for the given details. An airbag system consists of two or three sensors that detect and/or decide whether a collision occurred. The integration is done analytically in order to eliminate rounding errors of numerical methods. 5 Apparent Luminosities and sizes: Dark Energy. To find acceleration, we can use the following equation: So when the velocity of an object changes at a uniform rate, this uniform change is also known as uniform or constant acceleration. As an object approaches the speed of light, more and more energy is needed to maintain its acceleration, with the result that to reach the speed of light, an infinite amount of energy would be required. The equations assume. 52 respectively (Figure 8). Test your knowledge of how to calculate deceleration using this interactive quiz. Now do the same formula with the same initial and final velocities, but use acceleration on the moon (-9. There are many other formulas related to acceleration in physics. Given that the motorist is 40m away from the junction which he stopped exactly at, calculate. Physics Equation Lists (Formulas and Topics) Memorizing GAMSAT physics equations does not replace understanding. Acceleration vs. Physics for the 21st century. I don't get how to set up this question. Ok out of all the equations and equation pyramids I can remember - I can't think of one to apply to this question on deceleration Q) The part of the space shuttle (orbiter) which returns to Earth has a mass of 78,000Kg and lands at a speed of 100m/s. Assuming constant deceleration, determine the (a) angular deceleration, (b) initial angular speed and (c) average angular speed. If the meteorite struck the car with a speed of 490 m/s, what was the magnitude of its deceleration, assuming it to be constant?. An object in motion is said to have velocity or acceleration. The acceleration formula is one of the basic equations in physics, something you'll want to make sure you study and practice. Acceleration. Download free College Physics 8th and 9th Editions assignments referencing Serway, and his related physics college textbooks. Be sure to show all of your work (given, equation, work, and answer with the proper units) Acceleration Equations: 1. In 1 dimension, we wrote down some general equations relating velocity to displacement, and relating acceleration to the change in velocity. Jefimenko and Richard P. Turning effect c. In a physics equation, given a constant acceleration and the change in velocity of an object, you can figure out both the time involved and the distance traveled. The equations and formulas provided aim to give you a better understanding of Newton's Law of Gravity. 4 s for online secondary education degree. As an example, if a street surface is dry, the average driver can safely decelerate an automobile or light truck with reasonably good tires at the rate of about 15 feet per second (fps). If firmly held in non-stretching seatbelt harness: Stopping distance 1 ft. 5 m/s 2 for a time period of 10 s. Some Physics of Motion: One of the most basic equations of motion is F = ma. The brakes are applied when the car is travelling at 100 km/h. Free physics student portal for online learning equations of motion quiz questions, MCQs to find questions answers based online learning tests. List only the quantities given in the problem and state the new unknown. The problem is that there is often a significant amount of energy wasted during deceleration when the application involves a lot of mass. I don't get how to set up this question. Using a spreadsheet Using a spreadsheet for repetitive data handling. Cosmology In Terms Of The Deceleration Parameter. She skids across the pool coming to a stop after 2. To calculate the acceleration, use a = (u - v) / t, where a is. First work out this equation using acceleration due to gravity on Earth (a = -9. We start by defining the scalar product of two vectors, which is an integral part of the definition of work, and then turn to defining and using the concept of work to solve problems. The brakes are applied when the car is travelling at 100 km/h. Space Shuttle Landing 7/8 Space Shuttle Velocity vs. Things can slow down as well as speed up. We will also, for the moment, pretend that braking traction is independent of cornering traction. The tennis serve is perhaps the most important facet of the game, as a successful serve greatly increases the chance of overall success. This chapter of The Physics Classroom Tutorial explores each of these representations of motion using informative graphics, a systematic approach, and an easy-to-understand language. Assuming uniform deceleration of this value, calculate the distance over which the front end of the car must be designed to collapse if a crash being the car to rest from 100 km/h. Acceleration, as heard in ads, follows the rule of the change of speed (miles per hour) over time, such as from zero to 60 miles per hour in seven seconds. Define acceleration and deceleration Lesson start: Acceleration is the rate of change of velocity. Suppose you are prepared to serve the shuttlecock. Area "C" is the driving region of the blade and produces the forces needed to turn the blades during autorotation. Most of the book is within the limits of CBSE syllabus. When you do not know the time, but have the velocity and distance, AND you know it is undergoing constant accelleration you can use the formula d = 1/2 (Vi+Vf) x t to solve for t and then you have the 3 required variables to solve the equation given. I can solve for v to get a velocity, and then use the velocity and deceleration to figure out when the car will reach 2m/s. In physics, acceleration is the rate of change of velocity of an object with respect to time. Problems and Solutions in Elementary Physics by C. Example: A boby is traveling along with a velocity of 12 m/s when it accelerates at 0. 3 in the Feynman Lectures on Physics, vol. Question 1: A body of mass 5kg is placed on a horizontal plane. First work out this equation using acceleration due to gravity on Earth (a = -9. Lift and drag are produced, but the total effect produces neither acceleration nor deceleration of the rotor RPM. Homework Equations. Deceleration also known as the negative acceleration. How to Calculate Tension in Physics. 68 m s^-2 so I'm looking for d (Distance) 2. How do I calculate the kynetic energy in Learn more about matlab. Assuming the bullet's deceleration to be constant, what is its magnitude? We have just learned this so im not sure how to really do this. As the bullet burrows into the plate, its motion is impeded by a frictional force which is directly proportional to the bullet's velocity. How do I calculate the kynetic energy in deceleration. 1 The physics of putting A. Test your knowledge of how to calculate deceleration using this interactive quiz. Personalize it with photos & text or purchase as is!. If you understand some physics, the equations for acceleration and deceleration should be familiar to you. That's part of Newtonian physics, although the form of the dependence on reference frame is different in modern relativity. Physics Formulas - Get list of all Physics formulas here at Vedantu. 1 times 10 to the 4 meters per second squared. Science · Physics · One-dimensional motion · Kinematic formulas and projectile motion What are the kinematic formulas? Here are the main equations you can use to analyze situations with constant acceleration. 602 19 × 10-19 C = 1. The average acceleration of a body given in the above equation is a during time t. Jefimenko and Richard P. Please try again later. However, this equation doens't help me, because in my current situation, I don't know the final velocity. Problems involving calculating speed, velocity and acceleration commonly appear in physics. Community Answer. Air Force officer who studied the effects of extreme deceleration on the human. The fastest physics reference. What are synonyms for deceleration?. Most of the book is within the limits of CBSE syllabus. If the rate of change of velocity during all these intervals remains constant then the acceleration a also remains constant. I supposed (maybe wrong) that if scientists agree on the existence of a BH in the center of a galaxy, that the galaxy was agglomerating (all the stuff gathers in the center) as in my casserole. 3 Mass and weight 1. Hence it is denoted by - a. In a physics equation, given a constant acceleration and the change in velocity of an object, you can figure out both the time involved and the distance traveled. Flip the tiles for symbols and again for units. What is the final velocity of this body?. In order for you to understand how we found these equations, it is important to understand speed, acceleration, free fall, and acceleration due to gravity. Airbus A380 take-off time. The First and Second Laws of Motion. That's part of Newtonian physics, although the form of the dependence on reference frame is different in modern relativity. The equations and formulas provided aim to give you a better understanding of Newton's Law of Gravity. This free fall calculator is a tool for finding the velocity of a falling object along with the distance it travels. Note that the more common term, Speed, is a velocity without a direction, so that 30 miles per hour or 20 meters per second are speeds, and not velocities, since no direction is specified. For a fixed deceleration, a car that is going twice as fast doesn’t simply stop. The answer given to this question is incorrect. In badminton, the speed or velocity of a player can be modeled by the equation v=d/t, where 'v' is the velocity, 'd' is the distance, and 't' is the time. , Math Tutor. Isaac Physics a project designed to offer support and activities in physics problem solving to teachers and students from GCSE level through to university. The tennis serve is perhaps the most important facet of the game, as a successful serve greatly increases the chance of overall success. yes technically your right. Then the acceleration is given by formula. s = ut + ½ at. The only force that acts on the car is the sudden deceleration from v to 0 velocity in a brief period of time, due to the collision with another object. It is best to just confine yourself to acceleration. NET Physics Equation List :Form 4 Introduction to PhysicsRelative Deviation Relative Deviation = Mean Deviation ×100% Mean ValuePrefixes Prefixes Value Standard form Symbol Tera 1 000 000 000 000 1012 T Giga 1 000 000 000 109 G Mega 1 000 000 106 M Kilo 1 000 103 k deci 0. deceleration ramp-down: limit jerk implies linear increase of acceleration to zero, quadratic decrease of speed, approaching the desired position at zero speed and zero acceleration The time allotted to segment 4, concerning constant velocity, is to be varied to suit the distance between the two positions. Some algebra is needed. A plane decelerates, or slows down, as it comes in for landing in St. - Rearrange the equation. Physics Formulas - Get list of all Physics formulas here at Vedantu. Analysing Motion Using frame grabbing software and spreadsheet software to determine velocity and accleration of an object. 4 Density 1. Deceleration. Calculations with Acceleration. The characteristics of time dependence of the BD parameter, obtained from these two models, are in qualitative agreement with each other. There are many other formulas related to acceleration in physics. If the cylinder starts from rest, and rolls down the slope a vertical distance , then its gravitational potential energy decreases by , where is the mass of the cylinder. Linear motion described in distance-time graphs and velocity-time graphs. Friedman equation for the present age of the universe. Acceleration is a Vector In physics acceleration not only has a magnitude (which is the m/s 2 number we discussed above), but also has a direction. 7 Extending things from 1 dimension. A motion is said to be uniformly accelerated when, starting from rest, it acquires, during equal time-intervals, equal amounts of speed. The answer given to this question is incorrect. Define acceleration and deceleration Lesson start: Acceleration is the rate of change of velocity. Spm physics-formula-list-form4 1. • Solving the equations can be achieved through a numerical process, but it is not necessary to solve them to capture some important mechanism. The ability to replace or apply absurd laws of the universe. stopping distance equations are often used where velocity is measured in miles per hour, deceleration in g-units, and distance in feet, resulting in incoherent equations. This function computes the average acceleration of a moving object, given the initial and final velocities, and also the total time spent. You speed up if the acceleration and velocity point in the same direction. Gravity: An equation for the magnitude of the force of gravity on the ball is given by: where m is the mass of the ball, approximately 57 g by regulation ( Source: [5]), and g is the acceleration due to gravity near the surface of the earth,. The only force that acts on the car is the sudden deceleration from v to 0 velocity in a brief period of time, due to the collision with another object. The constant acceleration equations. And so, we put a 'times 10 to the minus 3' in place of the milli prefix. If starting velocity, final velocity and time taken are given, Deceleration Formula is given by. Given that the motorist is 40m away from the junction which he stopped exactly at, calculate. So if you need to, you can always jump back to here for a clear starting point in your navigation. And so, now, we have 1. Deceleration A lorry driver brakes hard, and slows from 25 m/s to 5 m/s in 5 seconds. The below Deceleration calculator helps to calculate the result. Assuming uniform deceleration, what is the maximum safe speed of the train at the yellow signal?. Search for physics descriptions, diagrams, equations, theories, and even online calculators! Great tool for physics homework. If that formula yields a negative answer, it indicates a negative acceleration, or deceleration. In the following table, the stopping distance is obtained by measurement from four trials with four different cars. Now do the same formula with the same initial and final velocities, but use acceleration on the moon (-9. 1  A Step Backwards: Scalar Physics. Variation of Reality Warping. Homework Equations. And thank you for taking the time to help us improve the quality of Unity Documentation. b) the car's deceleration. Isaac Physics a project designed to offer support and activities in physics problem solving to teachers and students from GCSE level through to university. (b) If she then brakes to a stop in 0. Learn physics MCQs: time taken by a train to slow down from 80 kmh-1 to 20 kmh-1 with a uniform deceleration of 2 ms-2 is, with choices 9 s, 10 s, 8. Formula for deceleration? a van travelling with velocity 16 ms/1 decelerates until it comes to rest. At the bottom of a waterslide Stacey is travelling as 10 m/s. 1) if the intrinsic source sizes or luminosities are known. To calculate the deceleration, you can use the same formula for acceleration: a = (u - v) / t Where a is acceleration measured in m/s^2, u is the initial (starting) velocity, v is the final velocity and t is time measured in seconds. The variables used to describe motion are position (x), velocity (v), acceleration (a), and time (t). View College Physics_0075 from PHY 120 at Effingham County Gateway To College Academy. A solid body rotates with deceleration about a stationary axis with an angular deceleration β ∼ sqrt(ω) where ω is its angular velocity. Marco (view profile). The length of the chord is 40 feet. The number 30 is a. We will go through the details for. a space ship with a mass of 10000kg prepares itself to land on the moon. deceleration during the upward motion is 9. A point or an object moving in a straight line is accelerated if it speeds up or slows down. Deceleration is the final velocity minus the initial velocity, with a negative sign in the result because the velocity is dropping. Velocity Equations for Falling Objects. Physics 107 HOMEWORK ASSIGNMENT #1 Cutnell & Johnson , 7 th edition Chapter 2: Conceptual Question 12 Chapter 2: Problems 16, 28, 30, 32 12 A ball is dropped from rest from the top of a building and strikes the ground with a speed vf. Problems involving calculating speed, velocity and acceleration commonly appear in physics. (credit: Barry Skeates, Flickr) We might know that the greater the acceleration of, say, a car moving away from a stop sign, the greater the displacement in a given time. Penner Abstract: The motion of a rolling golf ball on a sloped golf green is modeled. The First and Second Laws of Motion. An object decelerates when is getting slower, its velocity is decreasing. (physics) a rate of increase of velocity. This decrease in potential energy must be offset by a corresponding increase in kinetic energy. is subject to the. How to Calculate Work In physics, work is the amount of energy required to perform a given task (such as moving an object from one point to another). From this equation it appears that the drag scale factor has physical units of (sq in / lb), but this is not true. The physics of baseball, in general, is a very interesting subject, and the physics of hitting a baseball, in particular, is a very involved area of study that calls upon a large amount of physics and engineering, especially when it comes to bat design, and the material used to make the bat (which is normally wood or aluminum). Engineering Physics for Lawyers. List only the quantities given in the problem and state the new unknown. Calculate the velocity of an object for the given details. The maximum deceleration of the train is 0. The Physics of a High-Speed Crash: 70 MPH vs. 7 Pressure 2. Generally, an acceleration less than 800 m/s 2 lasting for any length of time will not cause injury, whereas an acceleration greater than 1 000 m/s 2 lasting tor at least 1 ms will cause injury. Mass is common in all the terms in the equation, and therefore can be cancelled out. The data for M2 bullets provide an estimate of the Poncelet parameters. Find the mean angular velocity of the body averaged over the whole time of rotation if at the initial moment of time its angular velocity was equal to ω 0. I don't get how to set up this question. Negative acceleration, however, is acceleration in the negative direction in the chosen coordinate system. Traumatic brain injury such as concussion results when the head undergoes a very large acceleration. Anything pulled, hung, supported, or swung from a rope, string, cable, etc. The Mighty F = ma. 7 Extending things from 1 dimension. Energy resources c. The force of friction acts against the direction of motion. NOT at rotational equilibrium: Unequal weights in a balance such that the balance begins to tilt. com prepared by subject expert teachers. Note that F k < F s and consequently, μ k < μ s. This is a listing of all equations that we are using (updated as we go) from the text and class discussions. Just like acceleration, deceleration is calculated by taking the difference between the initial and final speeds divided by the time it took the object to change speed. Hint: model the motion as constant angular acceleration followed by constant angular deceleration; a graph of angular velocity vs. 0 m with a velocity of 12 m/s (E). Velocity Equations for Falling Objects. If you need to estimate it, visit our other calculators where you can find the kinetic energy formula, and it's angular version - the rotational kinetic energy formula. For acceleration. Such a body is said to possess uniform acceleration. To find the distance traveled, assuming initial velocity, acceleration and time taken are given, the initial velocity can be multiplied by time. These equations can also be applied to more complex problems like the speeds of sound and light, the velocity of planetary objects and the acceleration of. You can calculate this from the above formula where velocity is meters per second and time is in seconds. Chapter 10 Velocity, Acceleration, and Calculus The first derivative of position is velocity, and the second derivative is acceleration. Newton's Second Law formula: F = m * a Where: F: the magnitude of the net force,. For math, science, nutrition, history. The formulas are also similar to those of velocity. Search for physics descriptions, diagrams, equations, theories, and even online calculators! Great tool for physics homework. Assuming uniform deceleration, what is the maximum safe speed of the train at the yellow signal?. 7 ∘ and the car moves uphill?.