Question

State whether the given statement is true or false:
Friction is a necessary evil.
A. True
B. False

Answer 1

Hint: First thing to keep in mind is that friction is very necessary in our daily life. We need friction to drive a car, to walk and in many other activities, think in this way to answer.
We have to state whether the statement, “Friction is a necessary evil”, is true or false.

Complete step-by-step answer:

So, first let us discuss friction.

Friction –

Friction is a type of force that opposes the motion between any surfaces that are touching each other. We can also say that friction is hindrance in the motion of a body.

Now, the given statement is true due to following reason-

1. Friction wears out the rubbing machine parts.
2. Due to friction heat is produced that may damage the machines.
3. Also, friction results in wastage of energy.

So, friction has so many undesirable effects. But still it is necessary for almost all the functions in our daily lives and for all the machines and their mechanisms.
So, the statement that Friction is a necessary evil is true.

Note: A very important thing is that though friction has a lot of undesirable effects but still without frictional force, there are so many mechanisms which could not be performed without friction. For example, if friction is not there, we cannot hold our eye- glasses on our nose and ears. Also, hair pins and safety pins would be useless without friction and many more things and functions will stop without friction.