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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics
The equation of motion of a particle starting from rest along a straight line is x = t³ - 3t²+ 5. The ratio of the accelerations after 5 sec and 3 sec will be

2
4
5
3

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Applied Mechanics and Graphic Statics
The resultant of two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then,

None of these
P = Q
Q = R
P = R

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Applied Mechanics and Graphic Statics
One Newton force, is

10³ dynes
10⁶ dynes
10⁴ dynes
10⁵ dynes

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Applied Mechanics and Graphic Statics
The moment of inertia of a hollow circular section whose external diameter is 8 cm and internal diameter is 6 cm, about centroidal axis, is

337.5 cm⁴
137.5 cm⁴
237.5 cm⁴
437.5 cm⁴

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Applied Mechanics and Graphic Statics
The maximum velocity of a body vibrating with a simple harmonic motion of amplitude 150 mm and frequency 2 vibrations/sec, is

1.885 m/sec
0.18845 m/sec
18.85 m/sec
188.5 m/sec

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Applied Mechanics and Graphic Statics
The locus of the instantaneous centre of a moving rigid body, is

Centroid
Straight line
Involute
Spiral

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