Q.

Figure shows the kinetic energy K of a simple pendulum versus its angle θ from the vertical. The pendulum bob has mass 0.2 kg. The length of the pendulum in meterg=10m/s2 is _____________.

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answer is 1.5.

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Detailed Solution

Given that from graph 12mVm2=15×10−3Vm=0.150m/sAω=0.150m/sLθm⋅gL=0.150m/s⇒ gL=0.150100×10−3⇒ L=0.1500.1=1.5m
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Figure shows the kinetic energy K of a simple pendulum versus its angle θ from the vertical. The pendulum bob has mass 0.2 kg. The length of the pendulum in meterg=10m/s2 is _____________.