A runner accelerates uniformly from rest and reaches the finishing line with a speed of 15m/s. wt is his avg speed throughout this run??

Explain why electric current cannot exist if a current doesn't have a voltage source.

This energy transformation diagram represents the energy of a skateboarder moving along a half-pipe. as she skates toward the top of the half-pipe, her original kinetic energy is converted to potential energy and friction. how much of the energy is potential?

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