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Engineering Mechanics

Engineering Mechanics
The maximum efficiency of a lifting machine is

1/(m × V.R.)
1/m
m/V.R.
V.R./m

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Engineering Mechanics
The units of moment of inertia of mass are

kg/m
kg/m²
m²/kg
kg-m²

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Engineering Mechanics
The velocity of a particle (v) moving with simple harmonic motion, at any instant is given by (where, r = Amplitude of motion, and y = Displacement of the particle from mean position.)

ω.√(r² - y²)
ω.√(y² - r²)
ω².√(r² - y²)
ω².√(y² - r²)

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Engineering Mechanics
A redundant frame is also called __________ frame.

Imperfect
Deficient
None of these
Perfect

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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.

None of these
Inversely proportional
Directly proportional
Cube 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

mr²/4
mr²/2
mr²/8
mr²/6

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