A 2 kg stone tied at the end of a string of l m len"gt"h, is whirled along a vertical circle at a constant speed of `4 ms^-1`. The tension in the string has a value of 52 N when the stone is

Options

A. At the top of the circle
B. Halfway down
C. At the bottom of the circle
D. None of the above

Explanation

Distance travelled in `n^(th)`second,
`s_n=u+1/2a(2n-1)`
Distance covered by the first body in `5^(th)` second
`s_1=0+1/2xxa_1xx(10-1)=9/2a_1`
Distance covered by the second body
`s_2=(0+1)/(2)xxa_2xx((2xx3)-1)`
`=5/2a_2`
Since,`s_1=s_2`
`implies9/2a_1=5/2a_2`
`impliesa_1/a_2=5/9`
`:.a_1:a_2=5:9`