Energy Transformations — Unit test Answers

The table shows the dimensions of four wedges.

Which is an example of potential energy?

How much time is needed for a 15,000 W engine to do 1,800,000 J of work? (Power: P = W/t)

The total energy in a system is 675 J. The kinetic energy changes from 296 J to 432 J. Which statement best describes the potential energy of this system?

Fiona claims that the diagram below shows simple machines, but Chad claims that it shows a compound machine.

Doug is doing work. Without knowing exactly what he is doing, which can be said about the work he is doing?

This table shows four examples of experiments.

Dimas reads that it takes 270 N to lift a firefighter’s equipment. If a firefighter does 5400 J of work carrying the equipment up a staircase, how high does the firefighter climb? (Work: W = Fd)