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Engineering Mechanics

Engineering Mechanics
The resultant of two equal forces ‘P’ making an angle ‘θ’, is given by

2P tanθ/2
2P cosθ/2
2P cotθ/2
2P sinθ/2

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Engineering Mechanics
The unit of angular velocity is

Revolutions/min
rad/s
m/min
Both (B) and (C)

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Engineering Mechanics
Coefficient of friction depends upon

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

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

Inversely
None of these
Directly
Square root

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Engineering Mechanics
The unit of work in S.I. units is

joule
erg
Newton
kg-m

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Engineering Mechanics
The linear acceleration (a) of a body rotating along a circular path of radius (r) with an angular acceleration of α rad/s2, is

a = α.r
None of these
a = α/ r
a = r / α

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