A boy is pushing a box on a horizontal floor from a position of rest whilemoving on a straight line. Consider the three phases of motion. Floor is rough with a small friction ceofficient. (i) Initially a constant hard push on the box to get itmoving and attain a maximum velocity. (ii) Mild push to keep the box moving with constant velocity. (iii) To pull back the box to bring it to stop wilth same retardation. Which of the following graphs is CORRECT?

A boy is pushing a box on a horizontal floor from a position of rest w

1.	A boy is pushing a box on a horizontal floor from a position of rest whilemoving on a straight line. Consider the three phases of motion. Floor is rough with a small friction ceofficient. (i) Initially a constant hard push on the box to get itmoving and attain a maximum velocity. (ii) Mild push to keep the box moving with constant velocity. (iii) To pull back the box to bring it to stop wilth same retardation. Which of the following graphs is CORRECT?
Answer» SOLUTION :(C) DIRECTION of friction does not change (D) Friction is CONSTANT

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