Question

An eraser weighing 2N is pressed against the black board with a force of 5N . If the coefficient of friction is 0.4 , the force parallel to the black board is required to slide the eraser upwards with uniform velocity is ? Options are: (a)2N (b)2.8N (c)4N (d)4.8N

Answer 1

I have done it using free body diagram .
the answer is 4N.

Answer 2

Answer:

GIVEN IN THE ATTACHMENT...

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