Levers Simple Machines

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

What are the three main parts of a lever?

Back

The three main parts of a lever are the fulcrum, the effort, and the load.

Front

What is a first class lever?

Back

A first class lever is a type of lever where the fulcrum is located between the effort and the load. Example: A seesaw.

Front

What is a second class lever?

Back

A second class lever is a type of lever where the load is located between the fulcrum and the effort. Example: A wheelbarrow.

Front

What is a third class lever?

Back

A third class lever is a type of lever where the effort is applied between the fulcrum and the load. Example: A fishing rod.

Front

What is the function 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 the load.

Front

How does the position of the fulcrum affect the effort needed to lift a load?

Back

The closer the fulcrum is to the load, the less effort is needed to lift it. Conversely, the further the fulcrum is from the load, the more effort is required.

Front

What is mechanical advantage in levers?

Back

Mechanical advantage is the ratio of the load force to the effort force in a lever, indicating how much a lever amplifies the effort applied.

Front

What is an example of a first class lever in everyday life?

Back

An example of a first class lever is a pair of scissors.

Front

What is an example of a second class lever in everyday life?

Back

An example of a second class lever is a nutcracker.