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Engineering Mechanics

Engineering Mechanics
The unit of force in S.I. system of units is

Watt
Kilogram
Newton
Dyne

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Engineering Mechanics
The moment of inertia of a solid sphere of mass ‘m’ and radius ‘r’ is

2mr²/5
mr²/2
2mr²/3
mr²

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Engineering Mechanics
The force, by which the body is attracted, towards the center of the earth, is called

Mass
Weight
Impulsive force
Momentum

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Engineering Mechanics
If the body falls freely under gravity, then the gravitational acceleration is taken as

-8.9 m/s2
+8.9 m/s2
-9.8 m/s2
+9.8 m/s2

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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

4v
v
2v
8v

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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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