Physics: Is it easier to roll a barrel full of coal tar than to pull it?

Physics
Tutor: None Selected Time limit: 1 Day

Can any one explain why it is easier to roll a barrel full of coal tar than to pull?

Nov 20th, 2015

Thank you for the opportunity to help you with your question!

It is easier to roll a barrel full of coal tar than to pull because a good conductor of heat but a bad conductor of electricity.

Please let me know if you need any clarification. I'm always happy to answer your questions.
Nov 20th, 2015

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Nov 20th, 2015
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Nov 20th, 2015
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