Why is it more difficult to revolve a stone tied to a longer string than a stone tied to a shorter string ?

Explanation

`(i)` It is more difficult to revolve a stone tied to a longer string than a stone tied to a shorter string because in a shorter string the tension and the stones weight will be equal and opposite to each other.i.e. the string will be stiff enough (i.e. in balanced state) as we started revolving it.
`(ii)` But when we revolve the stone using a lengthy string, the weight of the stone will not be equal to the tension produced in the string i.e, they don't balance due to which the string is not stiff.
`(iii)` Also the tension is not sufficient enough to make a proper revolution.