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Engineering Mechanics

Engineering Mechanics
The acceleration of a particle moving with simple harmonic motion, at any instant is given by

ω2.y
ω3.y
ω.y
ω2/y

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

2mr²/5
2mr²/3
mr²/2
mr²

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Engineering Mechanics
The maximum acceleration of a particle moving with simple harmonic motion is

ω²r
ωr
ω
ω/r

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Engineering Mechanics
A spherical body is symmetrical about its perpendicular axis. According to Routh's rule, the moment of inertia of a body about an axis passing through its centre of gravity is (where, M = Mass of the body, and S = Sum of the squares of the two semi-axes.)

MS/3
MS/5
None of these
MS/4

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Engineering Mechanics
A ladder is resting on a rough ground and leaning against a smooth vertical wall. The force of friction will act

Upward at its upper end
Downward at its upper end
Perpendicular to the wall at its upper end
Zero at its upper end

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Engineering Mechanics
The frequency of oscillation of a compound pendulum is (where kG = Radius of gyration about the centroidal axis, and h = Distance between the point of suspension and C.G. of the body.)

2π. √(kG² + h²/gh)
1/2π. √(kG² + h²/gh)
1/2π. √(gh/kG² + h²)
2π. √(gh/kG² + h²)

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