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Engineering Mechanics

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

πd3/16
πd4/32
πd3/32
πd4/64

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Engineering Mechanics
The centre of gravity of a uniform lamina lies at

The bottom surface
The midpoint of its axis
All of these
The centre of heavy portion

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Engineering Mechanics
The force, by which the body is attracted, towards the center of the earth, is called

Mass
Momentum
Weight
Impulsive force

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Engineering Mechanics
Moment of inertia is the

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

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Engineering Mechanics
The wheels of a moving car possess

Potential energy only
Kinetic energy of translation only
Kinetic energy of rotation only
Kinetic energy of translation and rotation both

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Engineering Mechanics
A body of weight 'W' is required to move up on rough inclined plane whose angle of inclination with the horizontal is 'α'. The effort applied parallel to the plane is given by (where μ = tanφ = Coefficient of friction between the plane and the body.)

P = W (sinα + μcosα)
P = W (cosα + μsinα)
P = W tanα
P = W tan (α + φ)

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