work done on and by the system


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Hector Acosta Discussion 1H
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work done on and by the system

Postby Hector Acosta Discussion 1H » Fri Jan 19, 2018 3:21 pm

when is work lost, when the system does work or work is done on the system?

Abdullah2I
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Re: work done on and by the system

Postby Abdullah2I » Fri Jan 19, 2018 3:41 pm

Yeah, i have the same question.

Cynthia Tsang
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Re: work done on and by the system

Postby Cynthia Tsang » Fri Jan 19, 2018 5:32 pm

Work is negative when the system does work. Work is positive when work is done on the system.

Cali Rauk1D
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Re: work done on and by the system

Postby Cali Rauk1D » Fri Jan 19, 2018 5:38 pm

W is negative if work is done on the system and w is positive if work is done by system

Sophia Kim 1C
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Re: work done on and by the system

Postby Sophia Kim 1C » Sun Jan 21, 2018 2:58 pm

I'm fairly certain that work is positive (energy gained) when work is done BY the system and work is negative (energy lost) when work is done ON the system

Nehal Banik
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Re: work done on and by the system

Postby Nehal Banik » Sun Jan 21, 2018 3:03 pm

WORK itself is NEGATIVE when the system itself performs work on the surroundings, therefore logically WORK will be POSITIVE when work is done on the system.

Manasvi Paudel 1A
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Re: work done on and by the system

Postby Manasvi Paudel 1A » Sun Jan 28, 2018 6:21 pm

When work is being done by the system, w will be positive. When work is being done on the system, w will be negative.

Justin Chu 1G
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Re: work done on and by the system

Postby Justin Chu 1G » Sun Jan 28, 2018 6:25 pm

Work is positive when work is done by the system and negative when work is done on the system.

Kayla Ikemiya 1E
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Re: work done on and by the system

Postby Kayla Ikemiya 1E » Sun Jan 28, 2018 8:24 pm

When work is positive, work is done on the system. When work is negative, work is done by the system.

Nathan Tu 2C
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Re: work done on and by the system

Postby Nathan Tu 2C » Sun Jan 28, 2018 9:29 pm

Work is a method of transferring energy. When work is done on the system, it has a positive value because the internal energy increases. When work is done by the system, it has a negative value because the internal energy of the system decreases.

Bansi Amin 1D
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Re: work done on and by the system

Postby Bansi Amin 1D » Sun Jan 28, 2018 9:31 pm

When given a word problem, how can we tell that work is being done on the system or by the system?

Joyce Gu 1E
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Re: work done on and by the system

Postby Joyce Gu 1E » Sat Mar 17, 2018 7:20 pm

Bansi Amin 1D wrote:When given a word problem, how can we tell that work is being done on the system or by the system?


Work to system --> -w
Work from system --> +w

Troy Tavangar 1I
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Re: work done on and by the system

Postby Troy Tavangar 1I » Sun Mar 18, 2018 12:07 am

When w is negative, work is by the system whereas when work is positive, work is done on the system.


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