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Engineering Mechanics

Engineering Mechanics
The moment of inertia of a thin rod of mass 'm' and length 'l', about an axis through its centre of gravity and perpendicular to its length is

ml2/ 6
ml2/4
ml2/12
ml2/8

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Engineering Mechanics
Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its vertex and parallel to the base, is __________ than that passing through its C.G. and parallel to the base.

Nine times
Four times
Six times
Two times

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Engineering Mechanics
Moment of inertia of a circular section about its diameter (d) is

πd4/32
πd4/64
πd3/16
πd3/32

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Engineering Mechanics
If tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards, the acceleration of the lift is

None of these
g/4
g/2
g/3

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Engineering Mechanics
In ideal machines, mechanical advantage is __________ velocity ratio.

Less than
Greater than
None of these
Equal to

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Engineering Mechanics
Which of the following are vector quantities?

Linear velocity
Linear acceleration
Linear displacement
All of these

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