The froghopper can accelerate at 4.00 x 103 m/s2. The froghopper experiences this acceleration for 1.00 x 10-3 s as it leaves the ground. How fast is the froghopper traveling when it finishes its jump?

car travels on a straight, level road. (a) Starting from rest, the car is going 54 ft/s (37 mi/h) at the end of 4.0 s. What is the car's average acceleration in ft/s2? magnitude      13.5 ft/s2     (b) In 3.0 more seconds, the car is going 108 ft/s (74 mi/h). What is the car's average acceleration for this time period? magnitude     18  ft/s2     (c) The car then slows to 81 ft/s (55 mi/h) in 2.0 s. What is the average acceleration for this time period? magnitude       ????? ft/s2     (d) What is the overall average acceleration for the total time? magnitude       ????? ft/s2

The driver of a car traveling down the interstate slams on the brakes, causing the car to skid to rest over distance of 146.5 m. If the car experienced an acceleration of -10.5 m/s^2 during this time, how long did it take for the car to come to rest?

The engineer of an intercity train observes a rock slide blocking the train's path 550 m ahead and activates the train's emergency brakes. The train decelerates uniformly (Hint: negative acceleration) at 1.7 m/s and completely stopes just before hitting the rock. What is the initial speed of the train measured in m/s?

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

A rocket-powered sled moves along a track, eventually reaching a top speed of 247 m/s to the west. It then begins to slow down, reaching a complete stop after slowing down for 3.92 s. What was the sled s average acceleration and velocity during the slowdown phase?     0 m/s^2 0, 123.5 m/s west     63.0 m/s^2 west, not enough information     123.5 m/s^2 east, 123.5 m/s east     63.0 m/s^2 east, not enough information

A particle has a velocity of v= (3i+5j)m/s and a constant acceleration of a=(-1.5i-4.5j)m/s^2 What is its velocity after 2 seconds? Is it moving faster or slower after 2 seconds?

What is the unit for acceleration? A race car accelerates uniformly from 18.5 m/s to 46.1 m/s in 2.47 seconds. Determine the acceleration of the car. A blue beetle starts from rest and in 4.5 seconds is flying 2.2 m/s. What is the acceleration of this insect?

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?