Force work and Energy

When muscles are used to move something , --------- force is used.

• gravitational force

• muscular

• frictional

------------- force pulls things towards the centre of the Earth.

• gravitational force

• muscular

• frictional

A moving object stops due to ------------- force

• gravitational force

• muscular

• frictional

A _________ is used to lift or move things

• lever

• pulley

• inclined plane

• wheel and axle

_________ is a thin cone with spiral ridge.

• lever

• pulley

• screw

• wheel and axle

The different types of simple machines are (select 4)

• screw

• wedges

• pulley &lever

• crane

• wheel & axle

________ is done when an object moves.

• Energy

• Work

A tool which does not have many parts is called a _____ machine.

• Simple

• Complicated

Plants prepare food with the help of _____ energy.

• solar

• Mechanical

The _____ is a source of energy.

• sun

• Moon