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Engineering Mechanics

Engineering Mechanics
The maximum efficiency of a lifting machine is

m/V.R.
V.R./m
1/(m × V.R.)
1/m

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Engineering Mechanics
A smooth cylinder lying on a __________ is in neutral equilibrium.

Convex surface
Horizontal surface
Curved surface
None of these

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Engineering Mechanics
The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction in which the force acts. This statement is known as

Newton's third law of motion
Newton's first law of motion
Newton's second law of motion
None of these

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Engineering Mechanics
A differential pulley block has larger and smaller diameters of 100 mm and 80 mm respectively. Its velocity ratio is

10
20
40
5

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Engineering Mechanics
The acceleration of a particle moving with simple harmonic motion, at any instant is given by

ω2/y
ω2.y
ω.y
ω3.y

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Engineering Mechanics
The moment of inertia of a rectangular section 3 cm wide and 4 cm deep about X-X axis is

9 cm4
16 cm4
12 cm4
20 cm4

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