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Engineering Mechanics

Engineering Mechanics
A smooth cylinder lying on a __________ is in neutral equilibrium.

Horizontal surface
Curved surface
Convex surface
None of these

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Engineering Mechanics
In actual machines, mechanical advantage is _________ velocity ratio.

Equal to
Greater than
Less than
None of these

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

erg
Newton
joule
kg-m

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Engineering Mechanics
The acceleration of a particle moving with simple harmonic motion is __________ at the mean position.

None of these
Maximum
Zero
Minimum

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Engineering Mechanics
Efficiency of a screw jack is given by (where α = Helix angle, and φ = Angle of friction.)

tan(α - φ)/tanα
tan(α + φ)/tanα
None of these
tanα/tan (α + φ)

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Engineering Mechanics
The three forces of 100 N, 200 N and 300 N have their lines of action parallel to each other but act in the opposite directions. These forces are known as

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

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