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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics
A stone is thrown up a slope of inclination 60° to the horizontal. At what angle to the slope must the stone be thrown so as to land as far as possible from the point of projection ?

15°
30°
75°
45°

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

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

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Applied Mechanics and Graphic Statics
A rope is wrapped twice around a rough pole with a coefficient of friction ‘A . It is subjected to a force Fj 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 Fi is

e*72
e4*
1
e2*

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Applied Mechanics and Graphic Statics
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

2.5 m/sec
1.5 m/sec
0.5 m/sec
1.0 m/sec

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Applied Mechanics and Graphic Statics
If a flywheel increases its speed from 10 rpm to 20 rpm in 10 seconds, then its angular acceleration is

—rad/sec 20
—rad/sec 10
—rad/sec 30
None of these

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

Gravitational force
Centripetal force
Centrifugal force
None of these

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