Simple Machines

Front

What is a first class lever?

Back

A lever where the fulcrum is located between the load and the effort.

Front

What is a screw in terms of simple machines?

Back

An inclined plane wrapped around a straight piece of metal.

Front

How do you calculate the efficiency of a machine?

Back

Efficiency = (Output Work / Input Work) x 100%.

Front

What is a pulley?

Back

A device consisting of a rope, chain, or belt wrapped around a wheel that changes the direction of an applied force.

Front

Which inclined plane has the greatest mechanical advantage (MA)?

Back

The inclined plane with the longest length for the same height.

Front

What is a lever?

Back

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.

Front

What is mechanical advantage (MA)?

Back

The ratio of the output force to the input force in a machine.

Front

What is an inclined plane?

Back

A flat surface that is tilted at an angle to help lift objects.

Front

What is the formula for calculating work?

Back

Work = Force x Distance.