Question

Two particles P and Q, each of mass m kg, are attached to the ends of a light
inextensible string. The string passes over a fixed smooth pulley which is attached to
the edge of a rough plane. The plane is inclined at an angle a to the horizontal,
where tan a = 7/24. Particle P rests on the plane and particle Q hangs vertically, as
shown in the diagram. The string between P and the pulley is parallel to a line of
greatest slope of the plane. The system is in limiting equilibrium.
) (a) Show that the coefficient of friction between P and the plane is 4/3
[5]
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Answer 1

Explanation:

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