You are driving a car on a straight road at a speed of +25.0 m/s when you spot a desert tortoise walking across the road in front of you. You brake the car to a stop. The car slows down with a constant acceleration of −2.0 m/s2. How far does the car travel as it slows to a stop?

A car starts from rest with an acceleration of 5.3 m/s² which decreases linearly with time to zero in 10.3 seconds, after which the car continues at a constant speed. Determine the time t required for the car to travel 330 m from the start. Answer: t = i ! S

A Thomson's gazelle can run at very high speeds, but its acceleration is relatively modest. A reasonable model for the sprint of a gazelle assumes an acceleration of 4.2 m/s2m/s2 for 6.5 ss , after which the gazelle continues at a steady speed. What is the gazelle's top speed? Express your answer with the appropriate units.   A human would win a very short race with a gazelle. The best time for a 30 mm sprint for a human runner is 3.6 ss. How much time would the gazelle take for a 30 mm race? Express your answer with the appropriate units.   A gazelle would win a longer race. The best time for a 200 mm sprint for a human runner is 19.3 ss. How much time would the gazelle take for a 200 mm race? Express your answer with the appropriate units.

A rocket-powered sled moves along a track, eventually reaching a top speed of 150 m/s to the west. It then begins to slow down, reaching a complete stop after slowing down for 4.21 s. What was the sled s average acceleration and velocity during the slowdown phase? 35.6 m/s^2 east, not enough information 0 m/s^2 0, 75 m/s west 35.6 m/s^2 west, not enough information

Sarah is standing when she sees a boy running towards her with constant velocity 6.0 m/s. When they are 200 m apart, Sarah starts running to meet him. She runs with a constant acceleration, and by the time they meet, Sarah is running at 7.0 m/s. How long, from the time Sarah begins moving, does it take for them to meet?

A snowboarder on a slope starts from rest and reaches a speed of 2.4 m/s after 7.1 s. (a) What is the magnitude (in m/s2) of the snowboarder's average acceleration? in m/s2 (b) How far (in m) does the snowboarder travel in this time? in m

In heavy rush-hour traffic, you drive in a straight line at 12 m/s for 1.5 minutes, then you have to stop for 3.5 minutes, and finally, you drive at 15 m/s for another 2.5 minutes. Plot a position-versus-time graph for this motion. Your plot should extend from t = 0 minutes to t = 7.5 minutes. Assume x=0 and t=0 at the start of your motion.

A cheetah is hunting. Its prey runs for 3.50 s at a constant velocity of +7.50m/s. Starting from rest, what constant acceleration must the cheetah maintain in order to run the same distance as its prey runs in the same time?

The position of an object is given as a function of time as x(t) = (-3.00 m/s)t + (1.00 m/s2)t2. What is the average speed of the object between t = 0.00 s and t = 2.50 s?

An express train passes through a station. It enters with an initial velocity of 22.0 m/s and decelerates at a rate of 0.150 m/s² as it goes through. The station in 210.0 m long. How fast is it going when the nose leaves the station?