i. It is difficult to run fast on sand. ii. It is easy to roll than pull a barrel along a road.

i. It is difficult to run fast on sand. ii. It is easy to roll than pull a barrel along a road.
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Can you tell? i. It is difficult to run fast on sand. ii. It is easy to roll than pull a ... than a flat tyre. iv. Friction is a necessary evil.
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It is easier to roll a barrel than to pull it because (a) the full weight of the barrel comes into play when it is pulled (b) rolling friction is much less than sliding friction (c) the surface area of the barrel in contact with the road is more in the case of pulling (d) of a reason other than those mentioned

Description : It is easier to roll a barrel than to pull it because (a) the full weight of the barrel comes into play when it is pulled (b) rolling friction is much less than sliding friction (c) the surface ... in contact with the road is more in the case of pulling (d) of a reason other than those mentioned

Last Answer : Ans:(b)

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