simple machines

Two wheels of different sizes that rotate together

• lever

• pulley

• wheel and axle

A bar that is free to pivot about a fixed point

• lever

• pulley

• wheel and axle

A grooved wheel with a rope running along it

• wheel and axle

• pulley

• lever

An incline plane used to separate something

• screw

• wedge

• lever

An inclined plane wrapped around a cylinder

• incline plane

• screw

• wedge

Multiple pulleys that are connected by a rope

• single movable

• block and tackle

• single fixed pulley

What type of lever has the fulcrum in the middle?

• first class

• second class

• third class

What type of lever is a wheel barrel?

• first class

• second class

• third class

What type of lever is a hockey stick or a broom?

• first class

• second class

• third class

If you are using a board as a lever to lift something with the fulcrum exactly in the middle of the board, to make it easier to lift the object, what would you do?

• Move the fulcrum closer to where you are pushing

• Move the fulcrum closer to where you are lifting

• Use a longer board, but keep the fulcrum exactly in the middle of the board