To slide a heavy box, we generally left it a bit to place a metallic p

1.	To slide a heavy box, we generally left it a bit to place a metallic pipe below it Why ?
Answer» Solution :If the box is PULLED without PIPE, sliding FRICTION COMES into play while in PRESENCE of pipe, rolling friction comes into play. Since rolling friction is much less than sliding friction, it is easy to slide the box.

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To slide a heavy box, we generally left it a bit to place a metallic pipe below it Why ?

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