1. If you push a heavy box which is at rest, you must exert some force to start its
motion. However once the box is sliding you apply a lesser force to maintain that
motion. Why?
Answers
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1
Heavy box which is at rest posses Static friction.
And sliding box posses sliding friction.
We know that Static friction is always more than the sliding friction.
Static friction>sliding friction>rolling friction.
Therefore in order to move a box at rest we have to overcome static friction and we have to apply more force.
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