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Engineering Mechanics

Engineering Mechanics
Moment of inertia of a circular section about an axis perpendicular to the section is

πd4/32
πd3/32
πd4/64
πd3/16

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Engineering Mechanics
The ratio of limiting friction and normal reaction is known as

Angle of friction
Coefficient of friction
Sliding friction
Angle of repose

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Engineering Mechanics
When the lift is moving upwards with some acceleration, the pressure exerted by a man is __________ to its acceleration.

Cube root
None of these
Directly proportional
Inversely proportional

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Engineering Mechanics
The moment of inertia of a rectangular section 3 cm wide and 4 cm deep about X-X axis is

12 cm4
20 cm4
9 cm4
16 cm4

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

None of these
Inversely
Directly
Square root

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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
mr²/8
mr²/6
mr²/4

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