Question

What forces out the water from fabric in the washing machine?
(A) Magnetic force
(B) Frictional force
(C) Force of attraction
(D) Centrifugal force

Answer 1

To solve this question first we need to understand the definition and the basic concept of force. A force is a push or pull acted upon an object resulting in the object's interaction with another object. The SI unit of force is Newton (N).

Complete answer:
When the dirty clothes are put inside a washing machine or swished vigorously by hand, dirt is pulled away from the cloth and washed away in the water, leaving the cloth sparkling clean.
The centrifugal force helps in cleaning the dirty clothes. The centrifugal force acting between the clothes and the inside of the drum pushes them around in a circle. This force pushed the water from the clothes straight through the drum holes. The clothes experience the centrifugal force but the water does not experience the force. The clothes start spinning in the washing machine and the water goes in a straight line, which means that it goes straight through the holes of the drum. This process helps in getting the clothes cleaned.
So, the correct option is (D) Centrifugal force.

Additional Information:
Although there are various kinds of forces in nature, they all can be classified into 4 major types of forces. The four basic forces are the gravitational force, the electromagnetic force, the weak nuclear force, and the strong nuclear force.

Note:
The working principle of a washing machine is known as centrifugation. Centrifugation is basically a separation process which uses the action of centrifugal force to promote the accelerated settling down of particles in a solid-liquid mixture.