Doing work vs work done

[vanessas0123]

For w, when is it positive? Is it when work is being done on the system or when the work is being done by the system?

[zfinn]

when w is positive work is done on the system

[Orrin Zhong 4G]

Work is positive when work is done on the system but it is negative when the system is doing work.

[Shimei_2F]

W is positive when work is being done ON the system and negative when the system is doing the work.

[RasikaObla_4I]

Work is positive when it is being done on the system (eg. compression) while work is negative the system is doing work on the system (eg expansion).

[Aarushi Solanki 4F]

w is positive when work is done on the system and w is negative when the system does work.

[Daniel Yu 1E]

W for the system is negative when the system does work. W for the system is positive if work is done on the system.

[EllieSchmidtke_4I]

Doing work on the system results in a positive w value, whereas the system doing work results in a negative w value.

[Owen-Koetters-4I]

work is positive when it is done on the system and negative when it is done by the system