A block is placed over the plank which can rotate about a horizonta...

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A block is placed over the plank which can rotate about a horizontal edge passing through
\( \mathrm{P} \)
A. Select the correct graph between the friction
W force and the angle made by plank with the horizontal. Coefficient of friction is \( \sqrt{3} \).
(1)
(2)
(3)
(4)
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