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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

2mr²/5
2mr²/3
mr²/3
3mr²/5

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Engineering Mechanics
The coefficient of restitution for inelastic bodies is

Zero
More than one
One
Between zero and one

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Engineering Mechanics
The centre of gravity a T-section 100 mm × 150 mm × 50 mm from its bottom is

75 mm
87.5 mm
125 mm
50 mm

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Engineering Mechanics
The horizontal range of a projectile (R) is given by

R = u² cos2α/g
R = u² sinα/g
R = u² cosα/g
R = u² sin2α/g

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Engineering Mechanics
The unit of moment of inertia of an area is

m4
kg-m2
kg/m2
kg-m-s2

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Engineering Mechanics
Work done is said to be zero, when

No force acts on a body but some displacement takes place
None of these
Some force acts on a body, but displacement is zero
Either (A) or (B)

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