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Engineering Mechanics

Engineering Mechanics
In a screw jack, the effort required to lower the load is __________ the effort required to raise the same load.

None of these
Equal to
More than
Less than

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Engineering Mechanics
A body of mass ‘m’ moving with a constant velocity ‘v’ strikes another body of same mass moving with same velocity but in opposite direction. The common velocity of both the bodies after collision is

v
2v
4v
8v

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Engineering Mechanics
The centre of gravity of an isosceles triangle with base (p) and sides (q) from its base is

[√(4p² - q²)]/6
(4p² - q²)/6
(p² + q²)/4
(p² - q²)/4

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Engineering Mechanics
The centre of gravity of a right circular solid cone is at a distance of _________ from its base, measured along the vertical axis.(where h = Height of a right circular solid cone.)

h/3
h/6
h/4
h/2

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Engineering Mechanics
The impact between two lead spheres is approximately equal to an __________ impact.

Inelastic
Elastic
Solid
None of these

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Engineering Mechanics
Work done is said to be zero, when

No force acts on a body but some displacement takes place
Some force acts on a body, but displacement is zero
Either (A) or (B)
None of these

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