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Applied Mechanics and Graphic Statics

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

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

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Applied Mechanics and Graphic Statics
A hoop of radius 3 m weighs 100 kg. It rolls along a horizontal floor so that at its centre of mass has a speed of 200 mm/sec. The work required to stop the hoop is

4 J
2 J
6 J
8 J

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Applied Mechanics and Graphic Statics
The gravitational force makes a satellite go round the earth in a circular orbit, if it is projected with an initial velocity of

All listed here
11.11 km/sec at a height of 37,400 km
8.04 km/sec at a height of 285 km
11.26 km/sec, the satellite escapes the pull of the earth

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Applied Mechanics and Graphic Statics
Total no of instantaneous centers of a machine having ā€˜n’ links, is

n
n (n - 1)/2
(n - 1)
n/2

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Applied Mechanics and Graphic Statics
A particle is executing simple harmonic motion in a line 1.0 m long. If the time of one complete vibration is 1 sec, then the maximum velocity of the particle is

1.00 m/sec
6.28 m/sec
1.57 m/sec
3.14 m/sec

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Applied Mechanics and Graphic Statics
Minimum pull in a suspended cable with supports at two ends is equal to

Horizontal thrust
Resultant of horizontal thrust and support reaction
Half the weight of the cable
Support reactions

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