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Engineering Mechanics

Engineering Mechanics
The coefficient of friction depends upon

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

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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
db³/12
bd³/12
db³/36

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Engineering Mechanics
If the gravitational acceleration at any place is doubled, then the weight of a body will be

2g
g/2
√2.g
g

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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 = α/ r
a = r / α
None of these

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Engineering Mechanics
The law of the machine is (where P = Effort applied to lift the load, m = A constant which is equal to the slope of the line, W = Load lifted, and C = Another constant which represents the machine friction.)

P = mW + C
P = C - mW
P = m/W + C
P = mW - C

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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

mr²/6
mr²/2
mr²/8
mr²/4

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MORE MCQ ON Engineering Mechanics

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