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Applied Mechanics and Graphic Statics

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

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

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Applied Mechanics and Graphic Statics
Two parallel forces 20 kg and 15 kg act. In order that the distance of the resultant from 20 kg force may be the same as that of the former resultant was from 15 kg, the 20 kg force is diminished by

8.75 kg
10.5 kg
5.5 kg
6.25 kg

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Applied Mechanics and Graphic Statics
If the resultant of two forces has the same magnitude as either of the force, then the angle between the two forces is

60°
120°
45°
30°

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Applied Mechanics and Graphic Statics
The bending moment in an arch is proportional to

Vertical ordinate of the arch
Intercept between the arch axis and the funicular polygon
None of these
Vertical ordinate of funicular polygon

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Applied Mechanics and Graphic Statics
A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The mechanical advantage of the lifting machine is

26
20
15
18

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Applied Mechanics and Graphic Statics
A disc of mass 4 kg, radius 0.5 m and moment of inertia 3 kg.m² rolls on a horizontal surface so that its center moves with speed 5 m/see. Kinetic energy of the disc is

50 J
400 J
200 J
150 J

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