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Engineering Mechanics

Engineering Mechanics
The unit of force in S.I. system of units is

Newton
Dyne
Kilogram
Watt

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Engineering Mechanics
The periodic time (T) is given by (where, ω = Angular velocity of particle in rad/s.)

2π × ω
ω/2π
2π/ω
π/ω

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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
More than
Less than
Equal to

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

Downwards
None of these
Upwards
Horizontal

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Engineering Mechanics
The mechanical advantage of a lifting machine is the ratio of

Distance moved by effort to the distance moved by load
Output to the input
Load lifted to the effort applied
All of these

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Engineering Mechanics
Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the depth (d), is

db³/36
bd³/36
db³/12
bd³/12

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