Simple Machines ( pulley, wheel and axle)

Which of the following is NOT the best definition of a simple machine?

• A simple machine is a mechanical device that changes the direction or magnitude of a force.

• A simple machine is a a device with few or no moving parts that is used to modify motion and force in order to perform work.

• A simple machine is a mechanical device that makes our life easier.

• A simple machine is a basic mechanical device.

How many simple machines are there? Type your answer.

Which type of simple machine is the man using to move the object?

• incline plane

• lever

• wheel and axle

• pulley

Which type of simple machine is being used to move the object to its new location?

• inclined plane

• lever

• pulley

• wheel and axle

Which type of simple machine is the man using to lift the object?

• pulley

• wheel and axle

• lever

• incline plane

Which type of simple machine would be the BEST to chop a log?

• wedge

• lever

• pulley

• screw

Which type of simple machine is shown in the picture?

• pulley

• wheel and axle

• screw

• incline plane

The screw in the picture is an example of a simple machine.

• true

• false

All of the following are examples of a wheel and axle EXCEPT

• steering wheel

• door knob

• merry go round

• book

A fixed pulley is a simple machine that moves and is used to raise and lower lightweight objects such as a flag or a small sail.

• true

• false