Question

Example 11: A boy whirls a stone tied to a thread, such that the stone moves uniformly in a circle. What must
be the length of the thread if the stone completes 42 rounds in a minute with a uniform speed
of 2.2 m s-1?​

Answer 1

$\huge\star{\underline{\mathtt{\red{A}\pink{N}\green{S}\blue{W}\purple{E}\orange{R}}}}⋆$

In circular motion, the direction of velocity at a point is always along the tangent at that point. If string breaks, then the centripetal force acting on the stone becomes zero and it will move along a straight line tangential to the circular path.