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Engineering Mechanics

Engineering Mechanics
The moment of inertia of a solid sphere of mass ‘m’ and radius ‘r’ is

mr²/2
2mr²/3
mr²
2mr²/5

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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
More than
Equal to
Less than

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Engineering Mechanics
The moment of inertia of a thin disc of mass ‘m’ and radius ‘r’, about an axis through its center of gravity and perpendicular to the plane of the disc is

mr²/4
mr²/2
mr²/8
mr²/6

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Engineering Mechanics
The velocity ratio for the third system of pulleys is

n²
2n
2n - 1
n

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Engineering Mechanics
The range of projectile will be maximum for a given velocity of projectile, when the angle of projection (α) is

30° + β/2
45° + β/2
60° + β/2
β/2

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Engineering Mechanics
The units of moment of inertia of mass are

kg/m²
m²/kg
kg/m
kg-m²

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