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Engineering Mechanics

Engineering Mechanics
The rate of doing work is known as

Kinetic energy
Potential energy
Power
None 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 width (b), is

bd³/12
db³/36
bd³/36
db³/12

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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

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

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Engineering Mechanics
The moment of inertia of a square of side a about its diagonal is

a⁴/12
a³/12
a⁴/16
a²/8

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Engineering Mechanics
The range of projectile (R) on an upward inclined plane is

g. cos² β/2u². sin (α - β). cos α
2u². sin (α + β). cos α/g. cos² β
2u². sin (α - β). cos α/g. cos² β
g. cos² β/2u². sin (α + β). cos α

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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
(3/4) Ml²
(2/3) Ml²
(1/12) Ml²

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