Chapter 5 Review

Front

What is power in the context of work and time?

Back

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

Front

If two students unpack the same number of books, does the time taken affect the power used?

Back

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

Front

What type of simple machine is an axe?

Back

An axe is an example of a wedge.

Front

What is a compound or complex machine?

Back

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

Front

True or False: The input force is also known as the effort force.

Back

True.

Front

What is work in physics?

Back

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

Front

How is work calculated?

Back

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

Front

What is the relationship between work and power?

Back

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

Front

What is a lever?

Back

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

Front

What is an example of a pulley?

Back

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.