A2-kg book falls off a shelf. it hits a student traveling 2 m/s. how much kinetic energy does the book have?

8 j

2 j

1 j

4 j

What determines the amount of inertia an object has

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created