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Engineering Mechanics

Engineering Mechanics
Moment of inertia is the

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

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Engineering Mechanics
Which of the following is an equation of linear motion?(where, u and v = Initial and final velocity of the body, a = Acceleration of the body, and s = Displacement of the body in time t seconds.)

s = u.t + ½ a.t2
All of these
v = u + a.t
v2 = u2 + 2a.s

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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

bd³/36
db³/36
bd³/12
db³/12

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Engineering Mechanics
The coefficient of friction depends upon

Area of contact
Shape of the surfaces
All of these
Nature of surfaces

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Engineering Mechanics
A machine having an efficiency greater than 50%, is known as

Reversible machine
Non-reversible machine
Ideal machine
Neither reversible nor non-reversible machine

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

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

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