(1) The material is plastic |
(2) The arc of contact is circular with a radius greater than the radius of the roil. |
(3) Coefficient of friction is constant over the arc of contact and acts in one direction throughout the arc of contact. |
Select the correct answer using the code given below: |
A) 1 and 2
B) 1 and 3
C) 2 and 3
D) 1, 2 and 3
Correct Answer: D
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