1.

A box is given a push across the floor. It comes to stop shortly after. Which one of the following reasons explain why this happen?

A.  Gravity is acting on the box in the direction opposite to the box's movement.
B.  Friction is acting on the box in the same direction of the box's movement.
C. \[\frac{1}{\sqrt{2}-1}\]  
D.  The heat produced during the box's movement slows down the box.
Answer» D.  The heat produced during the box's movement slows down the box.


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