Simple Machines

What is a machine?

• A machine is a mechanical device which is hard to operate

• A machine is a tool that helps to make our work easier and helps us to do work with lesser force

• It is a robot

• It is a gadget

What is a lever?

• It is a rigid bar resting on a pivot

• It is a rod

• It is a device

• It is a mechanical device

What is a first class lever?

What is a fulcrum?

• It is a fixed point.

• It is a movable point.

• It is a fixed point on which the rod moves.

• It is a movable point on which the rod stays.

Which type of lever is it (if it is a lever)?

• Class-one lever

• Class-two lever

• Class-three lever

• It is not a lever

What kind lever is it and identify the object

• Second class: Bottle opener

• Second class: Lead piping

• First class: Crow bar

• Third class: Spanner

What machine does this use?

• A screw

• A fixed pulley

• An inclined plane

• A movable pulley

Tick all which are pulleys

• Well

• Garage door

• A crowbar

• A spanner

Choose the inclined plane

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Tick all the pictures of wheel and axle

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