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Engineering Mechanics

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 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.)

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

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Engineering Mechanics
If the gravitational acceleration at any place is doubled, then the weight of a body will be

g/2
g
√2.g
2g

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Engineering Mechanics
The maximum frictional force which comes into play when a body just begins to slide over another surface is called

Kinematic friction
Limiting friction
Sliding friction
Rolling friction

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Engineering Mechanics
The moment of inertia of a solid cylinder of mass 'm', radius 'r' and length 'l' about the longitudinal axis or polar axis is

mr²/8
mr²/4
mr²/6
mr²/2

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

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

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