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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics
A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The efficiency of the lifting machine is

0.5
0.55
0.4
0.3

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Applied Mechanics and Graphic Statics
A shell travelling with a horizontal velocity of 100 m/sec explodes and splits into two parts, one of mass 10 kg and the other of 15 kg. The 15 kg mass drops vertically downward with initial velocity of 100 m/sec and the 10 kg mass begins to travel at an angle to the horizontal of tan”1 x, where x is

3/5
3/4
5/3
4/5

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Applied Mechanics and Graphic Statics
The maximum frictional force which comes into play, when a body just begins to slide over the surface of a another body, is known

Rolling friction
Limiting friction
Sliding friction
None of these

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Applied Mechanics and Graphic Statics
Two parallel forces 20 kg and 15 kg act. In order that the distance of the resultant from 20 kg force may be the same as that of the former resultant was from 15 kg, the 20 kg force is diminished by

10.5 kg
6.25 kg
8.75 kg
5.5 kg

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Applied Mechanics and Graphic Statics
If a body is lying on a plane whose inclination with the horizontal is less than the angle of friction, theni. a force is required to move the body upwardsii. a force is required to move the body downwardiii. the body will not be in equilibriumThe correct answer is

both (i) and (iii)
only (i)
both (i) and (ii)
only (ii)

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Applied Mechanics and Graphic Statics
A smooth cylinder lying on its convex surface remains

In stable equilibrium
In neutral equilibrium
Out of equilibrium
In unstable equilibrium

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