two men tried to push a heavy box and finally could succeeded. later wheels were fixed to the same box and now a single man could move it. justify

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$Answer When wheels are fixed to the heavy box, then the aera is very much smaller in contact with surface therefore frictional force reduced so much and box moves easily by a single man .$

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two men tried to push a heavy box and finally could succeeded. later wheels were fixed to the same box and now a single man could move it. justify

Answer When wheels are fixed to the heavy box, then the aera is very much smaller in contact with surface therefore frictional force reduced so much and box moves easily by a single man.

$Answer When wheels are fixed to the heavy box, then the aera is very much smaller in contact with surface therefore frictional force reduced so much and box moves easily by a single man .$