unit 3 revision

The refers to the point where the lever gets its support.

We can use rollers to reduce the _________________ between heavy objects and the ground.

You want to use a flat surface to move something from a lower place to the

top of a pyramid with less force. What is this type of simple machine?

• gear

• lever

• incline

• pulley

Which type(s) of levers cannot save force?

• 1st class levers

• 2nd class levers

• 3rd class levers

What type of pulley do we usually use to hoist the flag?

In which direction should we apply the effort to hoist the flag to the top of the flagpole?