Ram and Shyam while returning from school saw a labour pushing hard to
move a heavy box. Ram immediately ran to him and started helping him in
pushing the box whereas Shyam brought two iron bars and asked the
labour to put them below the box and then to push the box.
(a) What are the factors that affect friction?
(b)Who will help the labour more-Ram or Shyam? How?
(c)What values of Ram and Shyam are shown here?
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Shyam's suggestion of keeping iron bar below the box will help the labour more. Putting the iron bar below the box will make it to roll over the bar. As rolling friction is less than sliding friction, it will help in moving the box with much easier. Ram and Shyam are helping in nature.
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