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Engineering Mechanics

Engineering Mechanics
The velocity ratio of a simple wheel and axle with D and d as the diameters of effort wheel and load axle, is

D × d
D - d
D / d
D + d

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Engineering Mechanics
When two elastic bodies collide with each other,

All of these
The two bodies begin to regain their original shape
The two bodies tend to compress and deform at the surface of contact
The two bodies will momentarily come to rest after collision

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Engineering Mechanics
The acceleration of a body sliding down an inclined surface is

g cosθ
None of these
g tanθ
g sinθ

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Engineering Mechanics
The center of gravity of a semi-circle lies at a distance of __________ from its base measured along the vertical radius.

8r/3
3r/ 8
4r/ 3π
3r/4π

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Engineering Mechanics
The range of projectile (R) on an upward inclined plane is

2u². sin (α - β). cos α/g. cos² β
g. cos² β/2u². sin (α - β). cos α
2u². sin (α + β). cos α/g. cos² β
g. cos² β/2u². sin (α + β). cos α

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Engineering Mechanics
The rate of doing work is known as

None of these
Power
Potential energy
Kinetic energy

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