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Engineering Mechanics

Engineering Mechanics
The center of percussion of a solid cylinder of radius ‘r’ resting on a horizontal plane will be

3r/2
r/2
r/A
2r/3

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Engineering Mechanics
The velocity ratio of a differential pulley block with D and d as the diameters of larger and smaller pulley, is

D/(D - d)
2D/(D - d)
D/(D + d)
2D/(D + d)

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Engineering Mechanics
A machine having an efficiency greater than 50%, is known as

Neither reversible nor non-reversible machine
Reversible machine
Ideal machine
Non-reversible machine

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Engineering Mechanics
The law of motion involved in the recoil of gun is

Newton's first law of motion
Newton's third law of motion
None of these
Newton's second law of motion

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Engineering Mechanics
When the lift is moving upwards with some acceleration, the pressure exerted by a man is __________ to its acceleration.

None of these
Directly proportional
Inversely proportional
Cube root

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Engineering Mechanics
The rate of change of displacement of a body is called

Momentum
None of these
Acceleration
Velocity

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