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Engineering Mechanics

Engineering Mechanics
The moment of inertia of a rectangular section 3 cm wide and 4 cm deep about X-X axis is

20 cm4
12 cm4
16 cm4
9 cm4

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Engineering Mechanics
The moment of inertia of a thin disc of mass ‘m’ and radius ‘r’, about an axis through its center of gravity and perpendicular to the plane of the disc is

mr²/4
mr²/8
mr²/2
mr²/6

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Engineering Mechanics
Moment of inertia is the

All of these
Second moment of mass
Second moment of area
Second moment of force

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

πd3/32
πd4/32
πd4/64
πd3/16

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Engineering Mechanics
Whenever a force acts on a body and the body undergoes a displacement, then

None of these
Body has kinetic energy of translation
Power is being transmitted
Work is said to be done

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Engineering Mechanics
The linear acceleration (a) of a body rotating along a circular path of radius (r) with an angular acceleration of α rad/s2, is

a = α.r
a = r / α
None of these
a = α/ r

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