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Engineering Mechanics

Engineering Mechanics
The process of finding out the resultant force is called __________ of forces.

Decomposition
None of these
Resolution
Composition

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Engineering Mechanics
The periodic time of one oscillation for a simple pendulum is (where l = Length of the pendulum.)

2π. √(l/g)
None of these
(1/2π). √(g/l)
(1/2π). √(l/g)

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

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

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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

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

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Engineering Mechanics
Work done is said to be zero, when

Some force acts on a body, but displacement is zero
No force acts on a body but some displacement takes place
Either (A) or (B)
None of these

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Engineering Mechanics
The moment of inertia of a solid sphere of mass ‘m’ and radius ‘r’ is

2mr²/3
2mr²/5
mr²/2
mr²

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