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Engineering Mechanics

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

Decomposition
Composition
None of these
Resolution

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Engineering Mechanics
The centre of percussion of the homogeneous rod of length ‘L’ suspended at the top will be

3L/4
2L/3
L/3
L/2

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Engineering Mechanics
The center of percussion of a solid cylinder of radius ‘r’ resting on a horizontal plane will be

r/A
2r/3
r/2
3r/2

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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 coefficient of restitution for inelastic bodies is

Zero
One
More than one
Between zero and one

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

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