Simple Machines, Work, and Mechanical Advantage

Front

What are the units of force?

Back

Newtons

Front

How can the efficiency of a machine be increased?

Back

By reducing friction.

Front

What does the Force-Distance Trade-Off describe?

Back

A simple machine decreases the force necessary to do work by increasing the distance.

Front

Why is a machine less than 100% efficient?

Back

Because of friction.

Front

What are the units for work?

Back

Joules.

Front

What is a simple machine?

Back

A device that makes work easier by allowing us to apply less force over a greater distance.

Front

What is mechanical advantage?

Back

The ratio of the output force exerted by a machine to the input force applied to it.

Front

What is the formula for calculating work?

Back

Work = Force x Distance.

Front

What is the relationship between work and energy?

Back

Work is a transfer of energy; when work is done, energy is transferred from one system to another.

Front

What is efficiency in the context of machines?

Back

The ratio of useful work output to total work input, usually expressed as a percentage.