Comparing the amount of work done


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Yuchien Ma 2L
Posts: 46
Joined: Wed Sep 21, 2016 2:58 pm

Comparing the amount of work done

Postby Yuchien Ma 2L » Sun Jan 15, 2017 12:47 pm

How do we compare the amount of work done? Do we just disregard the negative signs when comparing the amount of work done, or do we have to take in account the direction in which the work is done?
For instance, is -343 J of work considered more work than +120 J of work?

Jenna Smith 3F
Posts: 10
Joined: Wed Sep 21, 2016 2:55 pm

Re: Comparing the amount of work done

Postby Jenna Smith 3F » Sun Jan 15, 2017 4:32 pm

When comparing amounts of work done, you can think of it in terms of the absolute value. So yes, -343 J is more work than +120 J. See example 8.2 in the textbook.


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