Science 8 Unit 5 Vocab Check

Front

What is work?

Back

Work is done when a force causes an object to move in the same direction that the force is applied.

Front

What is a pulley?

Back

A pulley consists of a grooved wheel with a rope or cable wrapped over it.

Front

What is power?

Back

Power is how quickly work is done.

Front

What is output force?

Back

Output force is the force that the machine applies.

Front

What is efficiency?

Back

Efficiency is the ratio of output work to input work.

Front

What is energy?

Back

Energy is the ability to do work.

Front

What is input force?

Back

Input force is the force that is applied to a machine.

Front

What is frictional force?

Back

Frictional force is the force that opposes the motion of an object.

Front

What is gravitational force?

Back

Gravitational force is the force of attraction between two masses.

Front

What is momentum?

Back

Momentum is the product of an object's mass and its velocity.