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Engineering Mechanics

Engineering Mechanics
One kg force is equal to

7.8 N
8.9 N
12 N
9.8 N

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Engineering Mechanics
Coefficient of friction depends upon

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

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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
Coplanar non-concurrent forces
Unlike parallel forces

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Engineering Mechanics
A force while acting on a body may

Give rise to the internal stresses in it
Change its motion
Balance the forces, already acting on it
All of these

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

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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 to
Equal and opposite to
Less than
Greater than

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