Work and Energy

Front

Calculate the PE of a 2 kg cat perched 10 meters above the ground.

Back

200 J

Front

In science, work is defined as this:

Back

Product of force exerted parallel and displacement.

Front

∆ in PE = mgh_f- mg__
Name the missing variable.

Back

Initial Height

Front

A 1 kg rock falls 20 meters, how fast is the rock going just before it hits the ground?

Back

20.0 m/s

Front

2 balls of equal mass roll down opposite sides from the top of a frictionless hill. Regardless of the path they take, what will the velocity of the balls be when they hit the ground?

Back

Same

Front

Sue raises a stack of books 2 meters using a force of 20N. Calculate work.

Back

40 J

Front

Mechanical energy is equal to the sum of Kinetic energy and _________ energy

Back

Potential

Front

Thermal energy is a type of mechanical energy.

Back

False

Front

Calculate the work needed to raise a 3 kg cat up to a height of 4 meters.

Back

120 J

Front

When my velocity triples, my kinetic energy increases by ______ times.

Back

9