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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics
A stone of mass 1 kg is tied to a string of length 1 m and whirled in a horizontal circle at a constant angular speed 5 rad/sec. The tension in the string is,

10 N
5 N
25 N
15 N

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Applied Mechanics and Graphic Statics
A shell of mass 100 kg travelling with a velocity of 10 m/sec breaks into two equal pieces during an explosion which provides an extra kinetic energy of 20000 Joules. If the pieces continue to move in the same direction as before, then the speed of the faster one must be

40 m/sec
20 m/sec
30 m/sec
50 m/sec

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Applied Mechanics and Graphic Statics
If the angle between the applied force and the direction of motion of a body, is between 90° and 180°, the work done, is called

Negative work
Zero work
Virtual work
Imaginary work

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Applied Mechanics and Graphic Statics
The torque produced by a force depends oni. the magnitude of the forceii. the direction of the forceiii. the point of application of the force relative to originThe correct answer is

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

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Applied Mechanics and Graphic Statics
For a self-locking machine, the efficiency should be

More than 50%
0.5
Less than 60%
None of these

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Applied Mechanics and Graphic Statics
Coefficient of friction depends on

Area of contact only
Both (A) and (B)
Nature of surfaces only
None of these

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