A 1700 kg car is moving with a velocity of 20 m/s and stops. a. What is the kinetic energy of the car as it moves with 15 m/s?
b. What is the kinetic energy of the car as it stops moving?
c. What is the change in the kinetic energy of the car?
d. How much work is done by the force of friction as it makes the car stop?

Apulley with a mechanical advantage of 5 will require you to pull times the amount of rope. a. 1/5 b. 5 c. 10 d. 15

The amount of potential energy possessed by an elevated object is equal to what?

Ahuge (essentially infinite) horizontal nonconducting sheet 10.0 cm thick has charge uniformly spread over both faces. the upper face carries +95.0 nc/m2 while the lower face carries -25.0 nc/ m2. what is the magnitude of the electric field at a point within the sheet 2.00 cm below the upper face? (ε0 = 8.85 × 10-12 c2/n · m2)