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Engineering Mechanics

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

2mr²/3
2mr²/5
7mr²/5
7mr²/3

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Engineering Mechanics
One joule is equal to

1 N-m
100 N-m
10 N-m
0.1 N-m

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Engineering Mechanics
The resultant of the two forces ‘P’ and ‘Q’ is ‘R’. If ‘Q’ is doubled, the new resultant is perpendicular to ‘P’. Then

P = Q
Q = R
None of the listed here
Q = 2R

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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

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

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

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

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Engineering Mechanics
A weight of 1000 N can be lifted by an effort of 80 N. If the velocity ratio is 20, the machine is

Reversible
None of these
Ideal
Non-reversible

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MORE MCQ ON Engineering Mechanics

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