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Engineering Mechanics

Engineering Mechanics
The periodic time of a particle with simple harmonic motion is _________ proportional to the angular velocity.

Square root
Directly
None of these
Inversely

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

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

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Engineering Mechanics
The forces, which meet at one point, but their lines of action do not lie in a plane, are called

Intersecting forces
Non-coplanar non-concurrent forces
Coplanar non-concurrent forces
Non-coplanar concurrent forces

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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

mr²/2
mr²/6
mr²/4
mr²/8

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Engineering Mechanics
A spherical body is symmetrical about its perpendicular axis. According to Routh's rule, the moment of inertia of a body about an axis passing through its centre of gravity is (where, M = Mass of the body, and S = Sum of the squares of the two semi-axes.)

MS/5
None of these
MS/4
MS/3

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Engineering Mechanics
Concurrent forces are those forces whose lines of action

Lie on the same line
Meet at one point
None of these
Meet on the same plane

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