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Engineering Mechanics

Engineering Mechanics
The moment of inertia of a solid cone of mass ‘m’ and base radius ‘r’ about its vertical axis is

4mr²/5
3mr²/5
2mr²/5
3mr²/10

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Engineering Mechanics
A machine having an efficiency less than 50%, is known as

Non-reversible machine
Ideal machine
Neither reversible nor non-reversible machine
Reversible machine

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Engineering Mechanics
Mass moment of inertia of a thin rod about its one end is ___________ the mass moment of inertia of the same rod about its mid-point

Same as
Four times
Twice
Thrice

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Engineering Mechanics
The time of flight of a projectile on downward inclined plane depends upon

Both (A) and (B)
None of these
Angle of inclination of the plane
Angle of projection

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Engineering Mechanics
On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be

Zero at its upper end
Perpendicular to the wall at its upper end
Upwards at its upper end
Downwards at its upper end

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Engineering Mechanics
The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction in which the force acts. This statement is known as

Newton's third law of motion
None of these
Newton's second law of motion
Newton's first law of motion

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