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Engineering Mechanics

Engineering Mechanics
When a body of mass 'm' attains a velocity 'v' from rest in time 't', then the kinetic energy of translation is

0.5 mgv2
0.5 mv2
mv2
mgv2

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Engineering Mechanics
The process of finding out the resultant force is called __________ of forces.

None of these
Composition
Resolution
Decomposition

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Engineering Mechanics
The resultant of two equal forces ‘P’ making an angle ‘θ’, is given by

2P cotθ/2
2P cosθ/2
2P tanθ/2
2P sinθ/2

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Engineering Mechanics
The unit of work in S.I. units is

kg-m
joule
erg
Newton

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Engineering Mechanics
The total energy possessed by a system of moving bodies

Is minimum in the start and maximum at the end
Is constant at every instant
Varies from point to point
Is maximum in the start and minimum at the end

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Engineering Mechanics
A ladder is resting on a rough ground and leaning against a smooth vertical wall. The force of friction will act

Zero at its upper end
Downward at its upper end
Upward at its upper end
Perpendicular to the wall at its upper end

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