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Engineering Mechanics

Engineering Mechanics
The moment of inertia of a rectangular section 3 cm wide and 4 cm deep about X-X axis is

16 cm4
12 cm4
9 cm4
20 cm4

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Engineering Mechanics
The forces, which meet at one point, but their lines of action do not lie in a plane, are called

Intersecting forces
Non-coplanar concurrent forces
Non-coplanar non-concurrent forces
Coplanar non-concurrent forces

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Engineering Mechanics
In order to completely specify angular displacement by a vector, it must fix

All of these
Magnitude of angular displacement
Direction of the axis of rotation
Sense of angular displacement

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Engineering Mechanics
The moment of inertia of a thin spherical shell of mass m and radius r, about its diameter is

3mr²/5
2mr²/3
2mr²/5
mr²/3

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Engineering Mechanics
The bodies which rebound after impact are called

Neither elastic nor inelastic bodies
Elastic bodies
Inelastic bodies
None of these

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Engineering Mechanics
The velocity ratio of a differential wheel and axle with 'D' as the diameter of effort wheel and d1 and d2 as the diameters of larger and smaller axles respectively, is

D/(d₁ + d₂)
2D/(d₁ - d₂)
D/(d₁ - d₂)
2D/(d₁ + d₂)

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