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77. Coefficient of friction is the | |
A. | angle between normal reaction and the resultant of normal reaction and the limiting friction [Wrong Answer] |
B. | ratio of limiting friction and normal reaction [Correct Answer] |
C. | the friction force acting when the body is just about to move [Wrong Answer] |
D. | the friction force acting when the body is in motion [Wrong Answer] |
E. | tangent of angle of repose. [Wrong Answer] |