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. (d) Arrange the types of friction according to the increasing order.
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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. Shyam is intelligent with scientific aptitude.
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