GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It is easier to roll a barrel full of coal tar than to pull it because
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the rolling friction is much less than the sliding friction
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coal tar is a liquid and it flows in the barrel when it is rolled
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the full weight of the barrel comes into play when it is pulled
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more surface area of the barrel is in contact with the road when it is pulled
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Explanation:
Detailed explanation-1: -The rolling friction is less than the sliding friction.
Detailed explanation-2: -Sliding friction is always less than rolling friction.
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