Question

A body of mass 1 kg tied to string is whirled in a vertical circle of radius 1 m. Find velocity and tension in the string

i. at the top of the circle

ii. at the bottom of the circle and

iii. at a point level with the centre.

Assume that the mass just goes around the circle at the top with minimum speed without the string slackening.

Answer 1

Required velocity and tension in the spring in different points are:

i At the top of the circle 3.13 m/s, zero

ii At the bottom of the circle 7 m/s, 58.8 N

iii at a point level with the centre 5.42 m/s, 29.4 N