However, friction can do positive work in certain frames of reference.

"I think the market probably believes some positive work will be done on the deficit."

In this scenario, the gas does positive work during the expansion, and its temperature decreases.

The sign convention is such that positive work is performed by the system on the environment.

Meanwhile there was more positive work to be done.

I think that kind of positive work, if it can be translated into other fields is splendid.

It does do a great deal of positive work.

That tells you something about the quality of the positive work done by Parliament: it should be congratulated.

There is really very good visibly positive work going on there.

Very interesting to read about this positive work using arts on a day when big cuts to the prison budget are reported.