A pendulum bob has a speed of $3\, m/s$ at its lowest position. The pendulum is $0.5\, m$ long. The speed of the bob, when the length makes an angle of ${60^o}$ to the vertical, will be ..... $m/s$ (If $g = 10\,m/{s^2}$)
A$3$
B$0.33$
C$0.5$
D$2$
Medium
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D$2$
d (d) Let bob velocity be $v$ at point $B$ where it makes an angle of $60^o$ with the vertical, then using conservation of mechanical energy
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