Question

A staircase is an example of

• A. Lever
• B. Wheel and axle
• C. Inclined plane
• D. Wedge

Answer 1

The correct option is C

Inclined plane

The explanation for the correct option:

C: Inclined plane

1. Inclined plane, a simple machine consisting of a sloping surface, used for raising heavy bodies.
2. A staircase is also known as an inclined plane it is a flat surface whose endpoints are at different heights.
3. Inclined plane helps you to do work by applying less effort.

The explanation for the incorrect options:

A: Wedge

1. Wedge: A double inclined plane is called a wedge.
2. A wedge is a simple machine, which helps us to tear apart solid objects.
3. Ex: ax, plow, knife, chisel, etc.

B: Lever

1. Lever: A lever is a simple machine that consists of a rigid bar that can rotate about a fixed point or a fixed line, called the axis of rotation.
2. The point or the axis of rotation is called the fulcrum.

D: Wheel and axle

1. Wheel and axle essentially consist of two cylinders of different diameters joined together, such that if one is made to rotate the other also rotates.
2. Ex: water tap, the doorknob, etc.

Hence, option C is correct.