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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics
For a self-locking machine, the efficiency should be

None of these
0.5
More than 50%
Less than 60%

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Applied Mechanics and Graphic Statics
A stone was thrown vertically upwards from the ground with a velocity of 50 m/sec. After 5 seconds another stone was thrown vertically upwards from the same place. If both the stones strike the ground at the same time, then the velocity with which the second stone was thrown should be (Assume g = 10 m/sec²)

25 m/sec
40 m/sec
50 m/sec
15 m/sec

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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

45°
30°
60°
120°

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Applied Mechanics and Graphic Statics
The angles between two forces to make their resultant a minimum and a maximum respectively are

180° and 90°
0° and 90°
90° and 180°
180° and 0°

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Applied Mechanics and Graphic Statics
A ladder of weight 'w' rests against a smooth vertical wall, and rests on rough horizontal ground, the coefficient of friction between the ladder and the ground being 1/4. The maximum angle of inclination of the ladder to the vertical, if a man of weight 'w' is to walk to the top of it safely, is tan'1 x, where x is

43834
3
4
43833

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Applied Mechanics and Graphic Statics
The vertical reaction at the support ‘A’ of the structure shown in below figure, is Applied Mechanics and Graphic Statics mcq question image

5 t
4 t
2 t
3 t

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