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Engineering Mechanics

Engineering Mechanics
The rate of doing work is known as

Power
None of these
Potential energy
Kinetic energy

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Engineering Mechanics
Coefficient of friction depends upon

Area of contact only
Both (A) and (B)
None of these
Nature of surface only

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

Away from the wall at its upper end
Upwards at its upper end
Towards the wall at its upper end
Downwards at its upper end

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Engineering Mechanics
The impact between two lead spheres is approximately equal to an __________ impact.

Inelastic
Elastic
None of these
Solid

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Engineering Mechanics
Centre of gravity of a solid cone lies on the axis at the height

Three eighth of the total height above the base
One fourth of the total height above base
One third of the total height above base
One-half of the total height above base

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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.

More than
None of these
Less than
Equal to

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