A stone of mass of 16 kg is attached to a string 144 m long and is whirled in a horizontal circle. The maximum tension the string can withstand is 16 Newton . The maximum velocity of revolution that can be given to the stone without breaking it, will be

Options

A. `20ms^(-1)`
B. `16ms^(-1)`
C. `14ms^(-1)`
D. `12ms^(-1)`

Answer

D

Explanation

Maximum tension `=(mv^(2))/(r)=16NrArr(16xxv^(2))/(144)=16`
`therefore" "v=12ms^(-1)`