1. A 2 kg toy car moves at a speed of 5 m/s. a. What is the kinetic energy of the car?
b. If a child applies a 3 N force for 2 m in the same direction the car is already moving, how much work is
done on the car?
c. What is the change in the car's kinetic energy from the applied force?
d. What is the final kinetic energy of the car? e. What is the velocity of the car after the child applies the 3 N force?

15. one purpose of the tread pattern on a tire is to a reduce tire wear. b. reduce traction c. allow water to flow away from the tire. d. look impressive.

An object's buoyant force and weight mean the same thing. a. trueb. false

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?