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One end of massless inextensible string ...

One end of massless inextensible string of length `l` is fixed and other end is tied to a small ball of mass `m`. The ball is performing a circular motion in vertical plane. At the lowest position, speed of ball is `sqrt(20gl)`. Neglect any other forces on the ball except tension and gravitational force. Acceleration due to gravity is `g`.
At the highest position of ball, tangential acceleration of ball is `-`

A

0

B

`g`

C

`5g`

D

`16g`

Text Solution

Verified by Experts

The correct Answer is:
A
At the highest position of ball, tangential acceleration of ball is zero.
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