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Engineering Mechanics

Engineering Mechanics
The moment of inertia of a thin spherical shell of mass m and radius r, about its diameter is

mr²/3
2mr²/5
3mr²/5
2mr²/3

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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
The maximum height of a projectile on a horizontal plane, is

u² cos²α/g
u² sin²α/2g
u² sin²α/g
u² cos²α/2g

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Engineering Mechanics
Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the depth (d), is

bd³/12
db³/36
bd³/36
db³/12

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Engineering Mechanics
The range of projectile on a downward inclined plane is ________ the range on upward inclined plane for the same velocity of projection and angle of projection.

Equal to
More than
None of These
Less than

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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

100
200
400
50

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