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Engineering Mechanics

Engineering Mechanics
A differential pulley block has larger and smaller diameters of 100 mm and 80 mm respectively. Its velocity ratio is

20
5
10
40

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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.

None of these
Directly proportional
Cube root
Inversely proportional

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Engineering Mechanics
The total energy possessed by a system of moving bodies

Is minimum in the start and maximum at the end
Varies from point to point
Is constant at every instant
Is maximum in the start and minimum at the end

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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

4.0 cm
3.0 cm
2.5 cm
5.0 cm

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Engineering Mechanics
The velocity ratio of a differential pulley block with D and d as the diameters of larger and smaller pulley, is

D/(D + d)
2D/(D + d)
2D/(D - d)
D/(D - d)

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Engineering Mechanics
The centre of gravity a T-section 100 mm × 150 mm × 50 mm from its bottom is

87.5 mm
75 mm
125 mm
50 mm

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