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Engineering Mechanics

Engineering Mechanics
The linear velocity of a body rotating at ω rad/s along a circular path of radius r is given by

ω²/r
ω/r
ω.r
ω².r

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Engineering Mechanics
In actual machines, mechanical advantage is _________ velocity ratio.

Equal to
Greater than
Less than
None of these

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Engineering Mechanics
The range of projectile will be maximum for a given velocity of projectile, when the angle of projection (α) is

60° + β/2
45° + β/2
β/2
30° + β/2

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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/3
g/2
g/4

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Engineering Mechanics
The maximum acceleration of a particle moving with simple harmonic motion is

ω²r
ωr
ω/r
ω

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Engineering Mechanics
A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span

5.0 cm
3.0 cm
2.5 cm
4.0 cm

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