Introduction to Machines

Machines make our life ____________.

• difficult

• chaotic

• easier

Machines that have one or fewer moving parts are known as ____________ .

• simple machines

• complex machines

_________________ machines have many moving parts.

• simple

• complex

Simple machines do not need ______________ .

• electricity

• human effort

A complex machine is combination of two or more than two _______________ machines.

• difficult

• compound

• simple

_________________ is a simple machine.

• car

• bicycle

• lever

___________________ is a complex machine.

• screw

• wheel and axle

• washing machine

______________ is a simple machine.

• wedge

• microwave

• smartphone

Pulley can also be regarded as a ______________.

• complex machine

• simple machine

• magical machine

What is the name of this simple machine?

• Wedge

• Pulley

• Inclined plane