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Engineering Mechanics

Engineering Mechanics
The moment of inertia of a thin rod of mass 'm' and length 'l', about an axis through its centre of gravity and perpendicular to its length is

ml2/12
ml2/4
ml2/8
ml2/ 6

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Engineering Mechanics
Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the depth (d), is

db³/12
bd³/36
bd³/12
db³/36

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

2mr²/3
mr²
mr²/2
2mr²/5

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Engineering Mechanics
The maximum height of a projectile on a horizontal plane, is

u² cos²α/g
u² sin²α/g
u² sin²α/2g
u² cos²α/2g

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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
Coplanar non-concurrent forces are those forces which __________ at one point, but their lines of action lie on the same plane.

Either ‘A’ or ‘B’
None of these
Meet
Do not meet

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