Lever 7-17

Front

What is a lever?

Back

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

Front

What is a fulcrum?

Back

A fulcrum is the point on which a lever rests or pivots.

Front

What are the three classes of levers?

Back

The three classes of levers are: 1st class (fulcrum in the middle), 2nd class (load in the middle), and 3rd class (effort in the middle).

Front

Can you give an example of a first-class lever?

Back

A seesaw is an example of a first-class lever.

Front

What is an example of a second-class lever?

Back

A wheelbarrow is an example of a second-class lever.

Front

What is an example of a third-class lever?

Back

A pair of tweezers is an example of a third-class lever.

Front

What does effort mean in the context of levers?

Back

Effort is the force applied to move the load using the lever.

Front

What is load in a lever system?

Back

Load is the weight or resistance that needs to be moved or lifted.

Front

How does a lever make work easier?

Back

A lever makes work easier by allowing a smaller force to move a larger load.

Front

What is mechanical advantage in levers?

Back

Mechanical advantage is the ratio of the load force to the effort force in a lever.