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Engineering Mechanics

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

None of these
Velocity
Acceleration
Momentum

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Engineering Mechanics
The maximum mechanical advantage of a lifting machine is

1 / m
1 + m
m
1 - m

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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.

Directly proportional
Inversely proportional
Cube root
None of these

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Engineering Mechanics
If a number of forces are acting at a point, their resultant is given by

√[(∑V)2 + (∑H)2]
(∑V)2 + (∑H)2
(∑V)2 +(∑H)2 +2(∑V)(∑H)
√[(∑V)2 +(∑H)2 +2(∑V)(∑H)]

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Engineering Mechanics
When two elastic bodies collide with each other,

The two bodies begin to regain their original shape
The two bodies tend to compress and deform at the surface of contact
All of these
The two bodies will momentarily come to rest after collision

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Engineering Mechanics
Moment of inertia of a triangular section of base (b) and height (h) about an axis through its base, is

bh3/36
bh3/8
bh3/12
bh3/4

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