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Engineering Mechanics

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

5
40
20
10

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Engineering Mechanics
A body of weight 'W' is required to move up on rough inclined plane whose angle of inclination with the horizontal is 'α'. The effort applied parallel to the plane is given by (where μ = tanφ = Coefficient of friction between the plane and the body.)

P = W (sinα + μcosα)
P = W tanα
P = W tan (α + φ)
P = W (cosα + μsinα)

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Engineering Mechanics
The equivalent length of a simple pendulum which gives the same frequency as compound pendulum is

h/(kG² + h²)
h²/(kG² + h²)
(kG² + h²)/h
(kG² + h²)/h²

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

erg
Newton
joule
kg-m

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Engineering Mechanics
Coefficient of friction depends upon

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

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Engineering Mechanics
In a screw jack, the effort required to lower the load is __________ the effort required to raise the same load.

Less than
More than
Equal to
None of these

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