Page 38 - What Where Why - 7

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Simple Machines

Machines make our work easier. They use power to apply forces and control movement to perform
an intended action.

Here are some simple machines which we use in our daily life. Identify and write their names
with the help of the picture clues.

1. A double-inclined plane that moves to Picture Clues
exert a force along the lengths of the sides.

____________________

2. A plane surface set at an acute angle to a
horizontal surface, direction of motion, or a
force direction.
Wheel
____________________

3. A simple machine that consists of a rigid
object and a fulcrum.
Lever
____________________

4. A wheel with a groove along its edge,
where a rope or cable can be placed. It Pulley
helps to change the direction and point of

application.
____________________ Screw
pic
5. A circular device that is attached to a
rigid bar in its centre. A force applied to it
causes the axle to rotate. Wedge

____________________

6. A shaft that has an inclined groove along
its surface.
Inclined Plane
____________________

Fact File

Whenever you lift any heavy thing, your elbow acts
as the fulcrum of the lever, and your arm bone acts as
the lever itself.

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