Energy, Work, and Simple Machines

When you perform work on an object you increase the energy of the object.

• True
• False

Work is measured in joules.

• True
• False

The law of conservation of electricity can be used to identify the energy changes in a system.

• True
• False

As you decrease the velocity of a car, you increase its kinetic energy.

• True
• False

Energy transferred by waves moving through the ground is called seismic energy.

• True
• False

When you go up a hill in a rollercoaster, as the distance between you and Earth increases, potential energy decreases.

• True
• False

The form of energy in fossil fuels is ____ energy.

• nuclear
• chemical
• radiant
• electrical

A slanted surface used to raise an object is a(n)____.

• efficiency board
• effort ramp
• inclined plane
• wedge

Which type of energy is not easily used to do useful work?

• electric
• waste
• nuclear
• thermal

A burning fire produces ____ energy.

• kinetic and potential
• radiant and thermal
• electrical and thermal
• chemical and radiant