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81
The ends of a string weighing w/metre are attached to two points at the same horizontal level. If the central dip is very small, the horizontal tension of the string throughout is
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Answer: Option C
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82
A rope is wrapped twice around a rough pole with a coefficient of friction $$\mu $$ . It is subjected to a force F1 at one end and a gradually increasing force F2 is applied at the other end till the rope just starts slip-ping. At this instant the ratio of F2 to F1 is
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Answer: Option B
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83
If two forces acting at a point are in equilibrium, they must be equal in magnitude and their line of action must be along
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Answer: Option B
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84
Force polygon method is applicable for
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Answer: Option C
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85
Force polygon method is applicable for
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Answer: Option C
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86
From a solid cylinder of height 8 cm and radius 4 cm, a right circular cone is scooped out on the same base and having the same height as that of the cylinder. The C.G. of the remainder is at a height of
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Answer: Option B
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87
The unit of impulse, is
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Answer: Option A
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88
The gravitational force makes a satellite go round the earth in a circular orbit, if it is projected with an initial velocity of
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Answer: Option D
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89
Two circular discs of same weight and thickness are made from metals having different densities. Which disc will have the larger rotational inertia about its central axis?
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Answer: Option B
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90
A rod 5 m in length is moving in a vertical plane. When it is inclined at 60° to horizontal, its lower end is moving horizontally at 3 m/sec and upper end is moving in vertical direction. The velocity of its upper end, is
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Answer: Option B
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