Question

"the cap of a pen can easily be opened with the help of two fingers than with one fingers" Explain why?

Answer 1

With one finger,less Force is exerted on the cap of a pen,so less Moment gets applied which becomes hard to open the cap Whereas

With 2 Forces,they form a Couple and Creates a Moment due to which it becomes easy to ope the cap of a pen,

Hope u got the answer

Answer 2

it's a very good question.

If we use one finger then a single force is applied but when we use our two fingers then two forces in an opposite direction are applied.

Rotational motion produced by a single finger is less then two equal and opposite forces.
Therefore it is easy to open the cap with two fingers