Worksheet on Simple Machines Class 4

1. What is an example of an inclined plane in everyday life?

a) A bicycle
b) A hammer
c) Stairs
d) A pair of scissors

Answer: c) Stairs are an example of an inclined plane in everyday life. They consist of a flat surface set at an angle, allowing people to easily move between different levels of a building.

2. Choose the correct option that represents the type of simple machine used in the picture.

a) Lever
b) Inclined plane
c) Wheel and axle
d) Pulley

Answer: d) The pulley is used in the well to raise or lower the bucket, making it easier to draw water from the well.

3. Which of the following is a third-class lever?

a)
b)
c)
d)

Answer: b) A fishing rod is an example of a third-class lever where the effort is between the load and the fulcrum.

4. Match the following.

a) 1:C, 2:A, 3:B
b) 1:C, 2:B, 3:A
c) 1:B, 2:A, 3:C
d) 1:A, 2:C, 3:B

Answer: a) Wheel and Axle: Two cylinders that revolve around a common point.
Inclined Plane: Flat surface that is higher on one end
Lever: A bar that helps us move heavy objects more easily.

5. Which simple machine is used by carpenters to split blocks of wood?

a) Screw
b) Lever
c) Wedge
d) Pulley

Answer: c) A wedge is a triangular-shaped tool with a sharp edge that is used to separate or split objects.