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Applied Mechanics and Graphic Statics

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

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

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Applied Mechanics and Graphic Statics
A projectile is fired with a velocity of 100.3 m/sec. at an elevation of 60°. The velocity attained by the projectile when it is moving at a height of 100 m, is

90 m/sec
80 m/sec
70 m/sec
75 m/sec

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

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Applied Mechanics and Graphic Statics
The torque produced by a force depends on (i) The magnitude of the force (ii) The direction of the force (iii) The point of application of the force relative to origin

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

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Applied Mechanics and Graphic Statics
The Centre of gravity of a 10 × 15 × 5 cm T section from its bottom, is

7.85 cm
7.5 cm
5.0 cm
8.75 cm

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Applied Mechanics and Graphic Statics
A ball is dropped from a height of 2.25 m on a smooth floor and rises to a height of 1.00 m after the bounce. The coefficient of restitution between the ball and the floor is

0.67
0.57
0.44
0.33

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