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Engineering Mechanics

Engineering Mechanics
Moment of inertia of a circular section about its diameter (d) is

πd4/64
πd3/32
πd3/16
πd4/32

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

Kilogram
Watt
Dyne
Newton

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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
In actual machines, mechanical advantage is _________ velocity ratio.

Greater than
Less than
Equal to
None of these

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Engineering Mechanics
The unit of angular acceleration is

N-m
m/s
rad/s2
m/s2

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Engineering Mechanics
The range of projectile will be maximum for a given velocity of projectile, when the angle of projection (α) is

30° + β/2
60° + β/2
β/2
45° + β/2

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