A ball of mass $0.25\, kg$ attached to the end of a string of length $1.96 \,m$ is moving in a horizontal circle. The string will break if the tension is more than $25 \,N$. .......... $m/s$ is the maximum speed with which the ball can be moved
AIPMT 1998, Easy
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(a) $T = \frac{{m{v^2}}}{r}$
$⇒$ $25 = \frac{{0.25\, \times {v^2}}}{{1.96}}$
$⇒$ $v = 14\,m/s$
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