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Engineering Mechanics

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

kg-m
Newton
erg
joule

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Engineering Mechanics
The forces, which meet at one point and their lines of action also lie on the same plane, are known as

Non-coplanar concurrent forces
Coplanar non-concurrent forces
Coplanar concurrent forces
Non-coplanar non-concurrent forces

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Engineering Mechanics
The centre of percussion of the homogeneous rod of length ‘L’ suspended at the top will be

L/2
L/3
3L/4
2L/3

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

n
2n - 1
2n
n²

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Engineering Mechanics
The maximum acceleration of a particle moving with simple harmonic motion is

ω
ω²r
ωr
ω/r

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

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