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Engineering Mechanics

Engineering Mechanics
The acceleration of a body sliding down an inclined surface is

None of these
g tanθ
g sinθ
g cosθ

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Engineering Mechanics
The moment of inertia of a sphere of mass 'm' and radius 'r', about an axis tangential to it, is

7mr²/3
2mr²/5
2mr²/3
7mr²/5

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Engineering Mechanics
A screw jack used for lifting the loads is

None of these
An ideal machine
A non-reversible machine
A reversible machine

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Engineering Mechanics
Coefficient of friction depends upon

Nature of surface only
Both (A) and (B)
Area of contact only
None of these

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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.

None of these
Directly proportional
Inversely proportional
Cube root

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Engineering Mechanics
Mass moment of inertia of a uniform thin rod of mass M and length (l) about its mid-point and perpendicular to its length is

(1/12) Ml²
(1/3) Ml²
(3/4) Ml²
(2/3) Ml²

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