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Engineering Mechanics

Engineering Mechanics
The maximum mechanical advantage of a lifting machine is

1 - m
m
1 + m
1 / m

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Engineering Mechanics
A body of mass ‘m’ moving with a constant velocity ‘v’ strikes another body of same mass moving with same velocity but in opposite direction. The common velocity of both the bodies after collision is

8v
2v
4v
v

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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
Inversely proportional
None of these

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Engineering Mechanics
The mechanical advantage of a lifting machine is the ratio of

Output to the input
All of these
Load lifted to the effort applied
Distance moved by effort to the distance moved by load

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Engineering Mechanics
Static friction is always __________ dynamic friction.

None of these
Equal to
Greater than
Less than

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Engineering Mechanics
The ratio of limiting friction and normal reaction is known as

Coefficient of friction
Sliding friction
Angle of repose
Angle of friction

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