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Engineering Mechanics

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

πd4/64
πd4/32
πd3/16
πd3/32

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Engineering Mechanics
A pendulum which executes one beat per second is known as

Compound pendulum
Simple pendulum
Second's pendulum
Torsional pendulum

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Engineering Mechanics
The resultant of the two forces ‘P’ and ‘Q’ is ‘R’. If ‘Q’ is doubled, the new resultant is perpendicular to ‘P’. Then

None of the listed here
P = Q
Q = 2R
Q = R

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Engineering Mechanics
Three forces acting on a rigid body are represented in magnitude, direction and line of action by the three sides of a triangle taken in order. The forces are equivalent to a couple whose moment is equal to

Half the area of the triangle
None of these
Twice the area of the triangle
Area of the triangle

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Engineering Mechanics
The algebraic sum of moments of the forces forming couple about any point in their plane is

Constant
Both of above are wrong
Equal to the moment of the couple
Both of above are correct

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Engineering Mechanics
The rate of change of displacement of a body is called

Velocity
None of these
Momentum
Acceleration

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