Chapter 5 Review

Power is the rate at which work is done, calculated as work done divided by the time taken.

Yes, the student who unpacks the books faster uses more power.

An axe is an example of a wedge.

A compound or complex machine is a combination of two or more simple machines.

True.

Work is done when a force causes an object to move in the direction of the force.

Work is calculated using the formula: Work = Force x Distance.

Power is the amount of work done per unit of time.

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

A pulley is a simple machine that consists of a wheel on an axle or shaft that is designed to support movement and change the direction of force.