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Engineering Mechanics

Engineering Mechanics
A pendulum which executes one beat per second is known as

Second's pendulum
Simple pendulum
Torsional pendulum
Compound pendulum

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Engineering Mechanics
During elastic impact, the relative velocity of the two bodies after impact is __________ the relative velocity of the two bodies before impact.

Equal and opposite to
Equal to
Greater than
Less than

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Engineering Mechanics
Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the width (b), is

bd³/36
db³/36
db³/12
bd³/12

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

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Engineering Mechanics
The mechanical advantage of a lifting machine is the ratio of

All of these
Output to the input
Distance moved by effort to the distance moved by load
Load lifted to the effort applied

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Engineering Mechanics
Coefficient of friction depends upon

Nature of surface only
None of these
Both (A) and (B)
Area of contact only

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