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Engineering Mechanics

Engineering Mechanics
Tension in the cable supporting a lift is more when the lift is moving __________ with an acceleration.

None of these
Downwards
Horizontal
Upwards

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

Convex surface
Horizontal surface
None of these
Curved surface

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Engineering Mechanics
The centre of percussion is below the centre of gravity of the body and is at a distance equal to

h × kG
kG2/h
h/kG
h2/kG

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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
bh3/12
bh3/4
bh3/36

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Engineering Mechanics
The force required to move the body up the plane will be minimum if it makes an angle with the inclined plane __________ the angle of friction.

Equal to
Greater than
None of these
Less than

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Engineering Mechanics
The law of the machine is (where P = Effort applied to lift the load, m = A constant which is equal to the slope of the line, W = Load lifted, and C = Another constant which represents the machine friction.)

P = mW - C
P = m/W + C
P = C - mW
P = mW + C

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