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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/4
g/3

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Engineering Mechanics
The velocity of a particle (v) moving with simple harmonic motion, at any instant is given by (where, r = Amplitude of motion, and y = Displacement of the particle from mean position.)

ω².√(r² - y²)
ω.√(r² - y²)
ω.√(y² - r²)
ω².√(y² - r²)

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Engineering Mechanics
Tension in the cable supporting a lift is more when the lift is moving __________ with an acceleration.

Upwards
Horizontal
None of these
Downwards

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Engineering Mechanics
The maximum frictional force, which comes into play, when a body just begins to slide over the surface of the other body, is known as

Static friction
Limiting friction
Dynamic friction
Coefficient of friction

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Engineering Mechanics
A redundant frame is also called __________ frame.

None of these
Imperfect
Perfect
Deficient

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

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

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