Physical science ch.4 test review (Energy, Power, Work)

Front

What are the two types of simple machines shown in the photo?

Back

Lever and wedge

Front

What must be true about an object for it to have kinetic energy?

Back

It must be moving.

Front

Energy cannot be ________ or ___________.

Back

Created or destroyed.

Front

What is the equation for work?

Back

Work = force x distance.

Front

What is the SI unit for power?

Back

Watts.

Front

Define energy.

Back

The ability to do work or cause change.

Front

What is power in terms of work?

Back

Power is the rate at which work is done.

Front

What is the formula for calculating power?

Back

Power = work / time.

Front

What is a lever?

Back

A simple machine that consists of a rigid bar that pivots around a fixed point called the fulcrum.

Front

What is a wedge?

Back

A simple machine that is a triangular shaped tool used to separate two objects or portions of an object.