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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

0.3
0.55
0.4
0.5

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Applied Mechanics and Graphic Statics
A satellite moves in its orbit around the earth due to

None of these
Centrifugal force
Centripetal force
Gravitational force

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Applied Mechanics and Graphic Statics
If two forces are in equilibrium, then the forces must(i) Be equal in magnitude(ii) Be opposite in sense(iii) Act along the same line

Only (i)
(i) and (ii)
All (i), (ii) and (iii)
(i) and (iii)

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Applied Mechanics and Graphic Statics
Two forces act an angle of 120°. If the greater force is 50 kg and their resultant is perpendicular to the smaller force, the smaller force is

25 kg
40 kg
50 kg
30 kg

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Applied Mechanics and Graphic Statics
The resultant of two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then,

Q = R
P = R
None of these
P = Q

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Applied Mechanics and Graphic Statics
A stone is whirled in a vertical circle, the tension in the string, is maximum

When the stone is at the highest position
At all the positions
When the string is horizontal
When the stone is at the lowest position

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