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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

3mr²/5
2mr²/3
2mr²/5
mr²/3

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Engineering Mechanics
When a body of mass moment of inertia 'I' (about a given axis) is rotated about that axis with an angular velocity to, then the kinetic energy of rotation is

Iω2
0.5 Iω2
Iω
0.5 Iω

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Engineering Mechanics
The center of gravity of a quadrant of a circle lies along its central radius (r) at a distance of

0.5 r
0.8 r
0.7 r
0.6 r

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Engineering Mechanics
The potential energy of a vertically raised body is __________ the kinetic energy of a vertically falling body.

Equal to
None of these
Greater than
Less than

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Engineering Mechanics
The velocity ratio of a single purchase crab winch can be increased by

Increasing the length of the handle
Increasing the radius of the load drum
All of these
Increasing the number of teeth of the pinion

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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
Less than
More than
None of These

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