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Engineering Mechanics

Engineering Mechanics
Mass moment of inertia of a thin rod about its one end is ___________ the mass moment of inertia of the same rod about its mid-point

Same as
Four times
Twice
Thrice

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Engineering Mechanics
An ideal machine is one whose efficiency is

Between 80 and 90%
1
Between 70 and 80%
Between 60 and 70 %

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Engineering Mechanics
According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through center of gravity (i.e. IP) is given by(where, A = Area of the section, IG = Moment of inertia of the section about an axis passing through its C.G., and h = Distance between C.G. and the parallel axis.)

IP = IG / Ah2
IP = Ah2 / IG
IP = IG + Ah2
IP = IG - Ah2

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Engineering Mechanics
The process of finding out the resultant force is called __________ of forces.

Resolution
Composition
None of these
Decomposition

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Engineering Mechanics
The coefficient of restitution for inelastic bodies is

One
Between zero and one
More than one
Zero

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Engineering Mechanics
The angular velocity (in rad/s) of a body rotating at N revolutions per minute is

2πN/60
πN/60
πN/180
2πN/180

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