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Engineering Mechanics

Engineering Mechanics
The velocity ratio of a first system of pulleys with 4 pulleys is

20
16
4
8

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Engineering Mechanics
A body of mass ‘m’ moving with a constant velocity ‘v’ strikes another body of same mass moving with same velocity but in opposite direction. The common velocity of both the bodies after collision is

2v
8v
v
4v

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Engineering Mechanics
A smooth cylinder lying on its convex surface remains in __________ equilibrium.

Unstable
None of these
Stable
Neutral

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Engineering Mechanics
If u₁ and u₂ are the velocities of two moving bodies in the same direction before impact and v₁ and v₂ are their velocities after impact, then coefficient of restitution is given by

(u₁ - u₂)/(v₁ - v₂)
(u₂ + u₁)/(v₂ + v₁)
(v₁ - v₂)/(u₁ - u₂)
(v₂ - v₁)/(u₁ - u₂)

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Engineering Mechanics
A redundant frame is also called __________ frame.

Perfect
None of these
Deficient
Imperfect

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Engineering Mechanics
The periodic time of one oscillation for a simple pendulum is (where l = Length of the pendulum.)

(1/2π). √(g/l)
None of these
2π. √(l/g)
(1/2π). √(l/g)

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