Classes of Lever

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, used to lift or move loads.

Front

What are the three classes of levers?

Back

The three classes of levers are: 1) First Class Lever, 2) Second Class Lever, 3) Third Class Lever.

Front

What is a first class lever?

Back

A first class lever has the fulcrum located between the effort and the load. Example: A seesaw.

Front

What is a second class lever?

Back

A second class lever has the load located between the fulcrum and the effort. Example: A wheelbarrow.

Front

What is a third class lever?

Back

A third class lever has the effort located between the fulcrum and the load. Example: Tweezers.

Front

What is the role of the fulcrum in a lever?

Back

The fulcrum is the pivot point around which the lever rotates, allowing the lever to lift or move a load.

Front

In a first class lever, where is the effort applied?

Back

In a first class lever, the effort is applied on one end of the lever, while the load is on the opposite end.

Front

In a second class lever, where is the load located?

Back

In a second class lever, the load is located between the fulcrum and the effort.

Front

What is an example of a third class lever?

Back

An example of a third class lever is a broom, where the effort is applied between the fulcrum (hand) and the load (dirt).

Front

How does the position of the load affect the class of lever?

Back

The position of the load relative to the fulcrum and effort determines the class of lever: first, second, or third.