simple machines

How many types of lever do we have

• class one lever

• wedge

• class two lever

• class three lever

what is an example of wedge

• knife

• screw

• well

• crane

why are machines useful

• help in doing work fast

• do not know

• all of these

• learning

what is this tool used for ?

• playing

• eating

• caring objects

• caring heavy objects

what is a lever ?

• a modified incline plane

• a rigid bar resting on a pivot

• wedge

• all of these

Is hammer a lever ?

a machine is a tool which

• saves our time

• makes work easier

• needs less effort

• all of these

examples of simple machine

• pulley

• wedge

• lever

• all of these

example of class one lever

• wheelbarrow

• nutcracker

• seesaw

• tweezers

which of the following is an example of a wedge

• knife

• stapler

• screw

• nutcracker