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Engineering Mechanics - Interview Questions and Answers

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51. 79. A body of weight W on inclined plane of a being pulled up by a horizontal force P will be on the point of motion up the plane when P is equal to
A. W
B. W sin (a + $)
C. Wtan(a + <|))
D. W\an(a-)
E. Wtana.
Explanation:
52. 93. Kinetic friction is the
A. tangent of angle between normal reac-tion and the resultant of normal reac-tion and the limiting friction
B. ratio of limiting friction and normal reaction
C. the friction force acting when the body is just about to move
D. the friction force acting when the body is in motion
E. dynamic friction.
Explanation:
53. 86. A projectile is fired at an angle 9 to the vertical. Its horizontal range will be maximum when 9 is
A. 0�
B. 30�
C. 45�
D. 60�
E. 90�.
Explanation:
54. 72. Which one of the following statements is not correct
A. the tangent of the angle of friction is equal to coefficient of friction
B. the angle of repose is equal to angle of friction
C. the tangent of the angle of repose is equal to coefficient of friction
D. the sine of the angle of repose is equal to coefficient to friction
E. none of the above.
Explanation:
55. 71. The ratio of limiting friction and normal reaction is known as
A. coefficient of friction
B. angle of friction
C. angle of repose
D. sliding friction
E. friction resistance.
Explanation:
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