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Engineering Mechanics

Engineering Mechanics
If tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards, the acceleration of the lift is

None of these
g/2
g/3
g/4

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Engineering Mechanics
If two bodies having masses m1 and m2 (m1>m2) have equal kinetic energies, the momentum of body having mass m1 is _________ the momentum of body having mass m2.

Less than
Equal to
Greater than
None of these

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Engineering Mechanics
Coefficient of friction depends upon

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

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Engineering Mechanics
A screw jack used for lifting the loads is

An ideal machine
A reversible machine
None of these
A non-reversible machine

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Engineering Mechanics
Two forces are acting at an angle of 120°. The bigger force is 40 N and the resultant is perpendicular to the smaller one. The smaller force is

40 N
None of the listed here
20 N
120 N

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Engineering Mechanics
If n = number of members and y = number of joints, then for a perfect frame, n = ?

43864
43832
43865
43892

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