A high-performance sports car can go from 0 to 100 mph (44.7 m/s) in 7.9s.  a) What is the car's average acceleration? b) The same car can come to a complete stop from 30 m/s in about 3.2 s. What is its average acceleration?

A woman , who is in such a hurry to get away from her irrate husband , is speeding down a straight road in her Mercedes . Starting from rest and traveling with a constant acceleration , she passes her mom's house traveling at 90mph . A mile later , her car is going 130mph . What is her acceleration ? How long did it take her to travel from rest to her mom's house ? How long did it take her to go the final mile ?

In this question we will work through the steps to solve this question: A bus is travelling along a straight road at 25 m/s (90 km/h) when the driver sees a deer on the road and slams on the breaks. This causes a constant deceleration (a negative acceleration) of k m/s2. It takes the bus 5 seconds to stop. How far does the bus travel before coming to a stop? Steps in solution: Let t= 0 at the moment the bus driver slams on the breaks. Let v (t) be the velocity of the bus at time t (measured in m/s). Let s (t) be the position of the bus at time t (measured in meters), and let's choose s (0) = 0. a) Find v (0) in m/s. [Select] b) What does "a constant deceleration (a negative acceleration) of k m/s2" mean? [Select] c) What does "It takes the bus 5 seconds to stop" mean? [Select] d) Use the information in parts (a)-(c) to find a value for k, and an expression for v (t) [Select] e) Use the information from (d) as well as s (0) = 0 to find an expression for s (t). [Select] f) What should…

A VW Beetle goes from 0 to 54.0 mi/h with an acceleration of +2.35 m/s2. (a) How much time does it take for the Beetle to reach this speed? (b) A top-fuel dragster can go from 0 to 54.0 mi/h in 0.600 s. Find the acceleration (in m/s2) of the dragster.

a) how long does it take for you to reach the open door and jump in? b) what is the maximum time you can wait before starting to run and still catch the bus

A black mamba snake has a length of 3.30 m and a top speed of 4.90 m/s. Suppose a mongoose and a black mamba find themselves nose to nose. In an effort to escape, the snake accelerates past the mongoose at 7.82 m/s2 from rest. How much time ?top does it take the snake to reach its top speed? How far ?snake does the snake travel in that time? How much time ?react does the mongoose have to react before the black mamba's tail passes the mongoose's nose?

A woman backs her van out of her parking space with a constant acceleration of 1.8 m/s2. Assume that her initial motion is in the positive direction. Part A: How long does it take her to reach a speed of 2.1 m/s in seconds?  Part B: If she then brakes to a stop in 0.65 s, what is her acceleration in meters per square second?

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

Marie-Philip Poulin begins from rest at one end of a 65 m long ice rink. She skates in a straight horizontal line and reaches the other end after 6.14s. She begins by accelerating with constant acceleration for 2.09 s before reaching top speed. She then continues at her top speed until she reaches the end of the rink. What is her speed when she reaches the end of the ice rink?

A bus moves along an x-axis a distance of 800 m, starting at rest (at x = 0) and ending at rest (at x = 800 m). Through the first 2 of that distance, its acceleration is +2.15 m/s?. Through the rest of the distance, its acceleration is -0.92 m/s?. Calculate a) time taken to cover the first half of the distance? b) the bus's maximum speed? c) total time to cover 800 m distance? Sketch velocity time graphs.