Work and Mechanical Advantage

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. It is used to lift or move loads with less effort.

Front

Give an example of a lever.

Back

An example of a lever is a hammer, which is used to drive nails into wood.

Front

What is resistance (output) force?

Back

Resistance (output) force is the force that is exerted by a machine on an object, helping to move or lift it.

Front

What is effort (input) force?

Back

Effort (input) force is the force that a person has to apply to a machine in order to make it work.

Front

What is required for work to be done?

Back

For work to be done, a force must move an object in the direction of the force.

Front

How does a crowbar work as a lever?

Back

When a crowbar is pushed down, it exerts an upward force on the lid, allowing it to be lifted.

Front

What is mechanical advantage?

Back

Mechanical advantage is the ratio of the output force produced by a machine to the input force applied to it.

Front

How can you calculate mechanical advantage?

Back

Mechanical advantage can be calculated by dividing the output force by the input force.

Front

What is the formula for work?

Back

The formula for work is Work = Force x Distance.

Front

What is the unit of work?

Back

The unit of work is the Joule (J), which is equal to one Newton meter.