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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics
A block of weight 50 kg is placed on a horizontal plane. When a horizontal force of 18 kg is applied, the block is just on the point of motion. The angle of friction is

19° 48'
20° 48'
18° 48'
17° 48'

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Applied Mechanics and Graphic Statics
Angular acceleration of a particle may be expressed as

All listed here
Radians/sec²
Revolutions/sec
Degrees/sec²

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Applied Mechanics and Graphic Statics
Maximum efficiency of a screw jack for the angle of friction θ, is

(1 + sin θ)/(1 - sin θ)
sin θ/(1 + sin θ)
(1 - sin θ)/(1 + sin θ)
(1 - sin θ)/sin θ

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Applied Mechanics and Graphic Statics
The ratio of the moment of inertia of a rectangle about its centroidal axis to the moment of inertia about its base, is

43894
43832
2
43834

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Applied Mechanics and Graphic Statics
If a body is lying on a plane whose inclination with the horizontal is less than the angle of friction, then i. a force is required to move the body upwards ii. a force is required to move the body downward iii. the body will not be in equilibrium The correct answer is

both (i) and (ii)
only (i)
both (i) and (iii)
only (ii)

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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

5
2
4
3

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