Question

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 can apply a lesser force to maintain that motion. Why?

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Answer 1

Explanation:

because at the starting the box at. in rest motion

after we can push it

it starts sliding or rolling the weight of box applied to move forward, its weight work to push through downward

then we can apply a lessor force to maintain a motion to push

Answer 2

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Explanation:We will apply a lesser force to stop the box as it is already in motion. The box is heavy and it also depends on the weight of the object. The box will not be pushed so far and even and the strongest force. Thus if the box is not pushed far and even it is sliding we can stop the sliding object even with the slightest force.