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Engineering Mechanics

Engineering Mechanics
Moment of inertia is the

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

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Engineering Mechanics
If a number of forces are acting at a point, their resultant will be inclined at an angle 'θ' with the horizontal, such that

tanθ = √(ΣV + ΣH)
tanθ = ΣH/ΣV
tanθ = ΣV/ΣH
tanθ = ΣV × ΣH

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Engineering Mechanics
The moment of inertia of a solid cone of mass ‘m’ and base radius ‘r’ about its vertical axis is

3mr²/10
2mr²/5
4mr²/5
3mr²/5

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

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

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

Mass
Weight
Momentum
Impulsive force

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Engineering Mechanics
The center of gravity of a quadrant of a circle lies along its central radius (r) at a distance of

0.5 r
0.7 r
0.8 r
0.6 r

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