Energy Transformations (Assignment)

Why does the total amount of energy before and after any energy transformations remain the same?

Because energy cannot be created or destroyed, the total input is equal to the total output. The total amount of energy remains the same even though it may change forms.

Describe the energy transformations that occur from the time a skydiver jumps out of a plane until landing on the ground.

Before jumping from the plane, the skydiver has potential energy. When the skydiver jumps, the potential energy is transformed into kinetic energy, which increases until the skydiver reaches terminal velocity. Potential energy is then transformed into thermal energy.

At which point(s) does the pendulum have the greatest potential energy?

both A and C

A quarterback throws a football down the field to the receiver. What type(s) of energy does the football possess? Check all that apply. chemical electrical kinetic mechanical potential

kinetic mechanical potential

Use the drop-down menu to complete the statement. A toaster transforms electrical energy into________ energy to toast bread

thermal

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?

175

Tyson throws a shot put ball weighing 7.26 kg. At a height of 2.1 m above the ground, the mechanical energy of the ball is 172.1 J. What is the velocity of the ball at the given point?

2.5

Andre, whose mass is 77.1 kg, sits on a diving board above a dunk tank. If he is sitting 0.90 m above the water, what is his total mechanical energy?

680