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Engineering Mechanics

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

Momentum
Acceleration
Velocity
None of these

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Engineering Mechanics
If a number of forces are acting at a point, their resultant will be inclined at an angle 'θ' with the horizontal, such that

tanθ = ΣV/ΣH
tanθ = ΣH/ΣV
tanθ = √(ΣV + ΣH)
tanθ = ΣV × ΣH

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

mr²/2
mr²
2mr²/3
2mr²/5

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Engineering Mechanics
If a body is acted upon by a number of coplanar non-concurrent forces, it may

All of these
Move in any one direction rotating about itself
Rotate about itself without moving
Be completely at rest

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Engineering Mechanics
If u₁ and u₂ are the velocities of two moving bodies in the same direction before impact and v₁ and v₂ are their velocities after impact, then coefficient of restitution is given by

(u₁ - u₂)/(v₁ - v₂)
(v₂ - v₁)/(u₁ - u₂)
(v₁ - v₂)/(u₁ - u₂)
(u₂ + u₁)/(v₂ + v₁)

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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

8v
v
2v
4v

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MORE MCQ ON Engineering Mechanics

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