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Engineering Mechanics

Engineering Mechanics
If the number of pulleys in a system is equal to its velocity ratio, then it is a __________ system of pulleys.

Second
Third
First
None of these

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

Less than
Greater than
None of these
Equal to

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Engineering Mechanics
Moment of inertia of a circular section about an axis perpendicular to the section is

πd3/32
πd4/32
πd3/16
πd4/64

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Engineering Mechanics
Work done is said to be zero, when

None of these
Some force acts on a body, but displacement is zero
Either (A) or (B)
No force acts on a body but some displacement takes place

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Engineering Mechanics
Mass moment of inertia of a uniform thin rod of mass M and length (l) about its mid-point and perpendicular to its length is

(1/3) Ml²
(2/3) Ml²
(1/12) Ml²
(3/4) Ml²

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Engineering Mechanics
The linear velocity of a body rotating at ω rad/s along a circular path of radius r is given by

ω.r
ω/r
ω²/r
ω².r

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