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Engineering Mechanics

Engineering Mechanics
The potential energy of a vertically raised body is __________ the kinetic energy of a vertically falling body.

Equal to
None of these
Greater than
Less than

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Engineering Mechanics
When the lift is moving upwards with some acceleration, the pressure exerted by a man is __________ to its acceleration.

Cube root
None of these
Inversely proportional
Directly proportional

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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

3.0 cm
2.5 cm
4.0 cm
5.0 cm

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Engineering Mechanics
A screw jack used for lifting the loads is

None of these
A non-reversible machine
An ideal machine
A reversible machine

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

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

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

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

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