A ball of mass 0.25kg attached to the ends of a string of length 1.96m is rotating in a horizonal circle. The string will break, If tension is more than 25N. What is the maximum velocity with which the ball can be rotated ?

Options

A. `3ms^(-1)`
B. `5ms^(-10`
C. `9ms^(-1)`
D. `14ms^(-1)`

Answer

C

Explanation

Force `F =(mv^(2))/(r)or v^(2)=(FR)/(m)=(25xx1.96)/(0.25)=196`
or maximum velocity v`=sqrt(196)=14ms^(-1)`