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Engineering Mechanics

Engineering Mechanics
The velocity ratio for the first system of pulleys is (where n is the number of pulleys.)

2n - 1
n²
n
2n

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Engineering Mechanics
The ideal angle of banking provided on the curves on roads depends upon

Weight of the vehicle
(Velocity)2 of the vehicle
Coefficient of friction between the road and vehicle contact point
Nature of the road surface

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Engineering Mechanics
A differential pulley block has larger and smaller diameters of 100 mm and 80 mm respectively. Its velocity ratio is

10
20
5
40

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Engineering Mechanics
Coefficient of friction depends upon

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

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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

Power
None of these
Potential energy
Kinetic energy

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