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Engineering Mechanics

Engineering Mechanics
The coefficient of friction depends upon

Area of contact
Nature of surfaces
All of these
Shape of the surfaces

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Engineering Mechanics
If a number of forces are acting at a point, their resultant is given by

(∑V)2 +(∑H)2 +2(∑V)(∑H)
√[(∑V)2 +(∑H)2 +2(∑V)(∑H)]
√[(∑V)2 + (∑H)2]
(∑V)2 + (∑H)2

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Engineering Mechanics
The total motion possessed by a body, is called

Weight
Momentum
Mass
Impulsive force

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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

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

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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
20 N
120 N
None of the listed here

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Engineering Mechanics
The maximum efficiency of a lifting machine is

1/m
V.R./m
m/V.R.
1/(m × V.R.)

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MORE MCQ ON Engineering Mechanics

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