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Engineering Mechanics

Engineering Mechanics
A smooth cylinder lying on a __________ is in neutral equilibrium.

None of these
Curved surface
Convex surface
Horizontal surface

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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
ω/r
ω².r
ω²/r

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Engineering Mechanics
During elastic impact, the relative velocity of the two bodies after impact is __________ the relative velocity of the two bodies before impact.

Equal and opposite to
Equal to
Greater than
Less than

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Engineering Mechanics
Work done is said to be zero, when

None of these
No force acts on a body but some displacement takes place
Either (A) or (B)
Some force acts on a body, but displacement is zero

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Engineering Mechanics
The velocity ratio of a single purchase crab winch can be increased by

Increasing the radius of the load drum
Increasing the length of the handle
Increasing the number of teeth of the pinion
All of these

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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

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

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