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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
ml2/12
ml2/8
ml2/4

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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
πd4/64
πd3/16

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Engineering Mechanics
A framed structure is imperfect, if the numbers of members are __________ (2j - 3).

Greater than
Either (B) or (C)
Less than
Equal to

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Engineering Mechanics
The velocity ratio for the first system of pulleys is (where n is the number of pulleys.)

n²
n
2n - 1
2n

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Engineering Mechanics
The centre of percussion of the homogeneous rod of length ‘L’ suspended at the top will be

L/3
3L/4
2L/3
L/2

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Engineering Mechanics
The resultant of the two forces ‘P’ and ‘Q’ is ‘R’. If ‘Q’ is doubled, the new resultant is perpendicular to ‘P’. Then

Q = 2R
Q = R
P = Q
None of the listed here

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