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Engineering Mechanics

Engineering Mechanics
The maximum efficiency of a lifting machine is

m/V.R.
1/m
1/(m × V.R.)
V.R./m

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Engineering Mechanics
If two bodies having masses m1 and m2 (m1>m2) have equal kinetic energies, the momentum of body having mass m1 is _________ the momentum of body having mass m2.

Equal to
None of these
Less than
Greater than

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Engineering Mechanics
In order to completely specify angular displacement by a vector, it must fix

Direction of the axis of rotation
All of these
Sense of angular displacement
Magnitude of angular displacement

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Engineering Mechanics
The velocity ratio for the third system of pulleys is

2n
n²
n
2n - 1

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

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Engineering Mechanics
The acceleration of a body sliding down an inclined surface is

g tanθ
g sinθ
None of these
g cosθ

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