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user 403912
Applies to questions of primarily educational value - not only questions that arise from actual homework assignments, but any question where it is preferable to guide the asker to the answer rather than giving it away outright. Please READ THE GUIDANCE IN META before asking homework-like questions.
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Work done in a system of masses
Let's say we have this system:
Why is the work
$$W_{tot} = mgh - F_f h$$
where $F_fh$ is the work done by friction?
I don't know why this happens. My guess would be to consider both blocks as one and …
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