statics

Related Questions

• Three coplanar forces each equal to P, act at a point. The middle one makes an angle of ${{60}^{o}}$with each one of the remaining two forces. If by applying force Q at that point in a direction opposite to that of the middle force, equilibrium is achieved, then

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• Any two coplanar couples of equal moments

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• Three forces P, Q, R are acting at a point in a plane. The angle between P, Q and Q, R are ${{150}^{o}}$and ${{120}^{o}}$ respectively, then for equilibrium; forces P, Q, R are in the ratio

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• Three forces of magnitude 30, 60 and P acting at a point are in equilibrium. If the angle between the first two is ${{60}^{o}}$, the value of P is

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• A sphere of radius r and weight W rests against a smooth vertical wall, to which is attached a string of length l where one end is fastened to a point on the wall and the other to the surface of the sphere. Then the tension in the string is

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