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Engineering Mechanics

Engineering Mechanics
The unit of force in S.I. system of units is

Newton
Watt
Kilogram
Dyne

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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
Moment of inertia is the

All of these
Second moment of area
Second moment of force
Second moment of mass

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Engineering Mechanics
The moment of inertia of a thin spherical shell of mass m and radius r, about its diameter is

3mr²/5
mr²/3
2mr²/3
2mr²/5

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Engineering Mechanics
The forces, whose lines of action are parallel to each other and act in the same directions, are known as

Like parallel forces
Coplanar concurrent forces
Unlike parallel forces
Coplanar non-concurrent forces

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Engineering Mechanics
In order to double the period of simple pendulum, the length of the string should be

None of these
Quadrupled
Doubled
Halved

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