If the kinetic and potential energy is a system are equal, then the potential energy increases. what happens as a result? a) total energy increases. b) stored energy decreases. c) energy of motion decreases. d) total energy decreases.

Which body is in equilibrium? (1) a satellite orbiting earth in a circular orbit (2) a ball falling freely toward the surface of earth (3) a car moving with a constant speed along a straight, level road (4) a projectile at the highest point in its trajectory