A bowling ball is hung from the ceiling by a steel wire. The instructor pulls the ball back and stands against the wall with the ball against his nose. To avoid injury the instructor is supposed to release the ball without pushing it. Explain why.

bowlingball

Bungee Ride

Energy transformations take place all the time and all around us, from a ride on the roller coaster to warming ourselves near a fire started in the open air. In a game of bungee ride, explain briefly what kind of energy changes take place.

BungeeJump