Energy, Work, and Simple Machines Chapter 3

Front

What happens to nuclear energy during the process of fusion?

Back

Nuclear energy is released when nuclei join.

Front

What is defined as a push or pull exerted on an object?

Back

Force.

Front

In a lever system, what is the role of the fulcrum?

Back

The fulcrum is the pivot point around which the lever rotates.

Front

What is a pulley?

Back

A grooved wheel with a rope or cable wrapped around it.

Front

What is an example of a simple machine that uses distance to multiply a force?

Back

The doorknob is an example of a wheel and axle.

Front

What is the mechanical advantage of using simple machines?

Back

Simple machines allow us to apply less force over a greater distance to accomplish work.

Front

What is the relationship between work, force, and distance?

Back

Work is done when a force is applied to an object and the object moves a distance in the direction of the force.

Front

What is the formula for calculating work?

Back

Work = Force x Distance.

Front

What type of simple machine is a lever?

Back

A lever is a simple machine that consists of a rigid bar that pivots around a fulcrum.

Front

What are the three classes of levers?

Back

First class, second class, and third class levers.