statics

Related Questions

• A uniform ladder of length 70m and weight W rests against a vertical wall at an angle of ${{45}^{o}}$ with the wall. The coefficient of friction of the ladder with the ground and the wall are $\frac{1}{2}$ and $\frac{1}{3}$ respectively. A man of weight $\frac{W}{2}$ climbs the ladder without slipping. The height in metre to which he can climb is

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• A uniform rod AB, 17m long whose mass is 120kg rests with one end against a smooth vertical wall and the other end on a smooth horizontal floor, this end being tied by a chord 8m long, to a peg at the bottom of the wall, then the tension of the chord is

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• The resultant of two parallel forces P,Q acting at A and B respectively acts at C when like and at D when unlike. If P>Q, then CD =

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• If two forces $P+Q$and $P-Q$make an angle $2\alpha $with each other and their resultant makes an angle $\theta $with the bisector of the angle between the two forces, then $\frac{P}{Q}$is equal to

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• A heavy uniform rod, 15cm long, is suspended from a fixed point by strings fastened to its ends, their lengths being 9 and 12 cm. If $\theta$ be the angle at which the rod is inclined to the vertical, then $\sin \theta =$

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