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Engineering Mechanics

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

Downwards
Upwards
None of these
Horizontal

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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

2.5 cm
4.0 cm
5.0 cm
3.0 cm

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Engineering Mechanics
In a screw jack, the effort required to lower the load is __________ the effort required to raise the same load.

None of these
Equal to
More than
Less than

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Engineering Mechanics
A ladder is resting on a rough ground and leaning against a smooth vertical wall. The force of friction will act

Upward at its upper end
Perpendicular to the wall at its upper end
Downward at its upper end
Zero at its upper end

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Engineering Mechanics
The center of gravity of a quadrant of a circle lies along its central radius (r) at a distance of

0.8 r
0.6 r
0.7 r
0.5 r

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Engineering Mechanics
When a person, on a bicycle, drives round a curve, he has to lean __________ to maintain equilibrium.

Outward
Towards back
Inward
Towards front

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