A body of mass $5\, kg$ is moving in a circle of radius $1\,m$ with an angular velocity of $2$ radian/sec. The centripetal force is ......... $N$
AIIMS 1998, Easy
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(b)Centripetal force$ = mr{\omega ^2} = 5 \times 1 \times {(2)^2} = 20\,N$
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