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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics
The unit of moments in M.K.S system, is

kg/m2
kg.m
kg/sec
kg/sec2

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Applied Mechanics and Graphic Statics
A particle is dropped from the top of a tower 60 m high and another is projected upwards from the foot of the tower to meet the first particle at a height of 15.9 m. The velocity of projection of the second particle is

18 m/sec
16 m/sec
20 m/sec
22 m/sec

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Applied Mechanics and Graphic Statics
A simple pendulum of length 1 has an energy E when its amplitude is A. If its amplitude is increased to 2A, the energy becomes

E
4E
E/2
2E

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Applied Mechanics and Graphic Statics
The height at which the end of a rope of length ‘l’ should be tied so that a man pulling at the other end may have the greatest tendency to overturn the pillar, is

½ l
l/√2
2/√3 l
¾ l

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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)/sin θ
sin θ/(1 + sin θ)
(1 - 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

5.5 kg
8.75 kg
10.5 kg
6.25 kg

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