Arock weighing 98 newtons is pushed off the edge of a bridge 50 meters above the ground. what was the potential energy of the rock before it began to fall?

Identify the forces that contribute to the centripetal force on the object in each of the following examples: a. a bicyclist moving around a flat, circular track b. a bicycle moving around a flat, circular track c. a racecar turning a corner on a steeply banked curve

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?