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Engineering Mechanics

Engineering Mechanics
The centre of percussion is below the centre of gravity of the body and is at a distance equal to

h × kG
h/kG
kG2/h
h2/kG

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Engineering Mechanics
A weight of 1000 N can be lifted by an effort of 80 N. If the velocity ratio is 20, the machine is

Non-reversible
Reversible
Ideal
None of these

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Engineering Mechanics
The force applied on a body of mass 100 kg to produce an acceleration of 5 m/s2, is

None of these
20 N
500 N
100 N

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Engineering Mechanics
The centre of percussion of the homogeneous rod of length ‘L’ suspended at the top will be

L/3
L/2
2L/3
3L/4

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

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Engineering Mechanics
For a self locking machine, the efficiency must be

Greater than 50%
Less than 50%
Equal to 50%
1

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MORE MCQ ON Engineering Mechanics

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