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Question 1 of 21. Question
A force of 20N applied parallel to the surface of a horizontal table, is just sufficient to make a block of mass 4kg move on the table. Calculate the coefficient of friction between the block and the Table (g = 10ms2)
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Question 2 of 22. Question
Which of the following statements about solid friction is/ are correct
I. Friction depends on the nature of the surface in contact
II. Friction is independs on the area of the contact
III. Friction always acts in the direction of motion
