Unit 4: Motion

Front

Potential energy

Back

The energy possessed by a body due to its position relative to others, stresses within itself, electric charge, and other factors.

Front

Kinetic energy

Back

The energy that a body possesses due to its motion.

Front

Mechanical energy

Back

The sum of potential energy and kinetic energy present in the components of a mechanical system.

Front

Work

Back

The process of energy transfer to an object via a force that causes the object to move.

Front

Efficiency

Back

The ratio of the useful work performed by a machine or in a process to the total energy expended or heat taken in.

Front

Friction

Back

The resistance that one surface or object encounters when moving over another.

Front

Simple machines

Back

Basic mechanical devices for applying a force, such as an inclined plane, wedge, or lever.

Front

Law of Conservation of Energy

Back

A principle stating that energy cannot be created or destroyed, but can be altered from one form to another.

Front

Heat

Back

The form of energy that is transferred between systems or objects with different temperatures (flowing from the high-temperature system to the low-temperature system).