1pm = __km

Text Solution

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The correct Answer is:
B
Here we have to consider oscillation of centre of mass.
Driving force, F=mg sin theta`
Acceleration =a=s/m=gsintheta`
`:. A=gtheta=g(m/L)`
[wehre g and L and const].
`:. A alpha x `
So the motion is simple Harmonic.
`Time period `t=2pisqrt(displacement/Acceleration)`
`=2pi sqrt(x/(gx/L))=2pi sqrt(L/g)`
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