## Presentation on theme: "For Your Consideration…"— Presentation transcript:

You lift a 2 kg textbook from the floor to a shelf 2.10 m above the floor. (a) What is the book’s gravitational potential energy relative to the floor? (b) What is the gravitational potential energy relative to your head, assuming you’re 1.65 m tall?

In an isolated system, which of the following is a correct statement of the quantity that is conserved? (a) kinetic energy (b) potential energy (c) kinetic energy plus potential energy (d) both kinetic energy and potential energy

A piece of ice with mass 15 kg falls from a roof 8.00 m above the ground. What is the speed of the ice when it reaches the ground?

For You to Consider… A bowling ball is suspended from the ceiling of a lecture hall by a strong cord. The ball is drawn away from its equilibrium position and released from rest at the tip of the demonstrator’s nose. If the demonstrator remains stationary, explain where the ball upon its return

For You to Consider… Would this demonstrator be safe if the ball were given a push from its starting position at her nose?