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Engineering Mechanics

Engineering Mechanics
The force, by which the body is attracted, towards the center of the earth, is called

Impulsive force
Weight
Mass
Momentum

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Engineering Mechanics
The moment of inertia of a thin disc of mass ‘m’ and radius ‘r’, about an axis through its center of gravity and perpendicular to the plane of the disc is

mr²/8
mr²/2
mr²/4
mr²/6

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Engineering Mechanics
A machine having an efficiency greater than 50%, is known as

Ideal machine
Reversible machine
Non-reversible machine
Neither reversible nor non-reversible machine

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Engineering Mechanics
Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its C.G. and parallel to the base, is

bh3/36
bh3/12
bh3/4
bh3/8

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Engineering Mechanics
When a body of mass moment of inertia 'I' (about a given axis) is rotated about that axis with an angular velocity to, then the kinetic energy of rotation is

Iω2
Iω
0.5 Iω
0.5 Iω2

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Engineering Mechanics
Coplanar non-concurrent forces are those forces which __________ at one point, but their lines of action lie on the same plane.

Either ‘A’ or ‘B’
None of these
Do not meet
Meet

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