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Engineering Mechanics

Engineering Mechanics
The angular velocity (in rad/s) of a body rotating at N revolutions per minute is

2πN/60
πN/180
πN/60
2πN/180

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Engineering Mechanics
Mass moment of inertia of a uniform thin rod of mass M and length (l) about its mid-point and perpendicular to its length is

(3/4) Ml²
(2/3) Ml²
(1/3) Ml²
(1/12) Ml²

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

None of these
Horizontal
Downwards
Upwards

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

8
4
20
16

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Engineering Mechanics
The center of percussion of a solid cylinder of radius ‘r’ resting on a horizontal plane will be

r/2
3r/2
2r/3
r/A

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Engineering Mechanics
The resultant of two equal forces ‘P’ making an angle ‘θ’, is given by

2P sinθ/2
2P tanθ/2
2P cosθ/2
2P cotθ/2

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