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Engineering Mechanics

Engineering Mechanics
The periodic time (T) is given by (where, ω = Angular velocity of particle in rad/s.)

π/ω
2π/ω
ω/2π
2π × ω

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Engineering Mechanics
The velocity ratio for the third system of pulleys is

n²
2n - 1
n
2n

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Engineering Mechanics
Coefficient of friction depends upon

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

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Engineering Mechanics
If a given force (or a given system of forces) acting on a body __________ the position of the body, but keeps it in equilibrium, then its effect is to produce internal stress in the body.

Change
None of these
Does not change
Changes periodically

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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
5
40
20

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Engineering Mechanics
The centre of gravity of an isosceles triangle with base (p) and sides (q) from its base is

(p² - q²)/4
(p² + q²)/4
[√(4p² - q²)]/6
(4p² - q²)/6

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