Classes of Levers

Front

What is a lever?

Back

A lever is a simple machine that helps lift or move heavy objects using a fulcrum, effort, and load.

Front

What are the three classes of levers?

Back

1st class, 2nd class, and 3rd class.

Front

What is a 1st class lever?

Back

A lever where the fulcrum is between the effort and the load, like a seesaw.

Front

What is a 2nd class lever?

Back

A lever where the load is between the fulcrum and the effort, like a door.

Front

What is a 3rd class lever?

Back

A lever where the effort is between the fulcrum and the load, like a golf club.

Front

Give an example of a 1st class lever.

Back

A seesaw or a pair of tin snips.

Front

Give an example of a 2nd class lever.

Back

A door or a wheelbarrow.

Front

Give an example of a 3rd class lever.

Back

A golf club or a fishing rod.

Front

What is the purpose of a lever?

Back

To make it easier to lift or move heavy objects.

Front

How does the position of the fulcrum affect a lever?

Back

The position of the fulcrum determines the class of the lever and affects the amount of effort needed to lift the load.