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A plank with a bar placed on it performs...

A plank with a bar placed on it performs horizontal harmonic oscillations with amplitude `a=10cm`. Find the coefficient of friction between the bar and the plank if the former starts sliding along the plank when the amplitude of oscillation of the plank becomes less than `T=1.0 s`.

Text Solution

Verified by Experts

The correct Answer is:
0.4
A=10cm
T=1.0sec
To prevent sliding,
`therefore mu=(Maomega^(2))/(Mg)=(Aomega^(2))/(g)=(10)/(10)xx((2pi)/(1))^(2)xx10^(-2)=40xx10^(-2)=0.4`
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