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Engineering Mechanics

Engineering Mechanics
In ideal machines, mechanical advantage is __________ velocity ratio.

None of these
Less than
Equal to
Greater than

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Engineering Mechanics
The time of flight (t) of a projectile on a horizontal plane is given by

t = 2u. sinα/g
t = 2u. cosα/g
t = 2u/g.sinα
t = 2u. tanα/g

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

Horizontal
Upwards
Downwards
None of these

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Engineering Mechanics
A spherical body is symmetrical about its perpendicular axis. According to Routh's rule, the moment of inertia of a body about an axis passing through its centre of gravity is (where, M = Mass of the body, and S = Sum of the squares of the two semi-axes.)

None of these
MS/4
MS/5
MS/3

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

Stable
None of these
Unstable
Neutral

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Engineering Mechanics
The acceleration of a body sliding down an inclined surface is

g cosθ
g tanθ
None of these
g sinθ

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