What happens to the total energy of an isolated system?

What change occurs as a dropped ball speeds up, ignoring air resistance?

During impact, a rubber ball briefly becomes compressed. What stores energy that helps it regain its shape and rebound?

A marble gradually slows while rolling along a rough, level paper track. Where does much of its mechanical energy go?

At which labeled point would the same cart have the greatest gravitational potential energy?

The bob swings without friction. At which labeled position does it move fastest?

An 80 kg cart starts from rest 30 m above the reference level. Using $g=9.8{\text{m/s}}^2$, what is its initial mechanical energy?

An 80 kg roller-coaster cart travels at 20 m/s. How much kinetic energy does it have?

A cart has 18,000 J of mechanical energy and 6,000 J associated with its motion. How much is stored because of its height?

A marble is released from rest on a track with no energy losses. How high can it rise on the opposite side?

Which part of the plant is marked R?

What is the main job of a hydroelectric plant's penstock?

Which energy transfer occurs in the turbine marked T?

Which energy transformation occurs in part G?

Plant operators partly close the intake gate while other conditions stay the same. What happens immediately to the water passing through it?

What is the role of the transmission lines marked L?

During the pictured process, a steadily operating plant receives 1,000 J from water and delivers 700 J of electrical energy. What happens to the remaining energy?

During the waterwheel activity, learners attach a heavier lifting load while keeping the water supply unchanged. What usually happens to the wheel?

Which ecological problem can result when a dam blocks a river?

Families displaced by a Philippine dam receive safe new homes, but their farms are flooded. Which additional support most directly addresses the loss of their farming income?