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Engineering Mechanics

Engineering Mechanics
The velocity ratio of a differential pulley block with D and d as the diameters of larger and smaller pulley, is

D/(D + d)
2D/(D - d)
D/(D - d)
2D/(D + d)

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Engineering Mechanics
The total motion possessed by a body, is called

Impulsive force
Weight
Momentum
Mass

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Engineering Mechanics
The time of flight (t) of a projectile on a horizontal plane is given by

t = 2u. sinα/g
t = 2u/g.sinα
t = 2u. tanα/g
t = 2u. cosα/g

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Engineering Mechanics
In a single threaded worm and worm wheel, the number of teeth on the worm is 50. The diameter of the effort wheel is 100 mm and that of load drum is 50 mm. The velocity ratio is

400
200
50
100

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Engineering Mechanics
Mass moment of inertia of a uniform thin rod of mass M and length (l) about its mid-point and perpendicular to its length is

(1/3) Ml²
(3/4) Ml²
(1/12) Ml²
(2/3) Ml²

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Engineering Mechanics
A redundant frame is also called __________ frame.

Perfect
Imperfect
Deficient
None of these

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