Question

A stone tied at one end of the string is whirled in vertical circle, where is the tension in the string be maximum and minimum? Show in the diagram​

Answer 1

answer

The minimum velocity required for a object to rotate in a verticle plane is v

1

=

5

gr.

So, at bottom point, T

max

=mv

1

2

/r+mg=6mg.

At top-most point velocity is v

2

=gr.

So, T

min

=mv

2

2

/r−mg=0

So T

max

−T

min

=6mg=2×g⇒m=1/3 kg