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Engineering Mechanics

Engineering Mechanics
The linear velocity of a body rotating at ω rad/s along a circular path of radius r is given by

ω/r
ω²/r
ω.r
ω².r

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Engineering Mechanics
The maximum frictional force, which comes into play, when a body just begins to slide over the surface of the other body, is known as

Dynamic friction
Static friction
Limiting friction
Coefficient of friction

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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.

Cube root
Directly proportional
None of these
Inversely proportional

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Engineering Mechanics
The unit of work in S.I. units is

joule
kg-m
Newton
erg

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Engineering Mechanics
The angular velocity (in rad/s) of a body rotating at N revolutions per minute is

2πN/60
πN/60
2πN/180
πN/180

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Engineering Mechanics
The velocity ratio for the first system of pulleys is (where n is the number of pulleys.)

2n
n
2n - 1
n²

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