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Discussion Forum : Physics - Section 1 (Q.No. 75)
Physics
75.
It is easier to roll a barrel full of coal tar than to pull it because
the full weight of the barrel comes into play when it is pulled
the rolling friction is much less than the sliding friction
more surface area of the barrel is in contact with the road when it is pulled
coal tar is a liquid and it flows in the barrel when it is rolled
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
2 comments Page 1 of 1.
Kingsley said:   1 decade ago
The energy used in rolling the fuel tank on the coal tar is much less because in pulling the fuel tank via an inclined plane the frictional force to be overcome will be greater than rolling it down the plane.
Muhammad Arif said:   2 years ago
It's pulling not sliding. I think option A is the correct answer.
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