Quote:
Originally Posted by STeeLy
I'm really hating on my physics prof right now... We have "assignments" that count towards our marks... These assignments have questions that are BEYOND what we have learned...
These problems that I did made sense to me but the answer didn't. Especially the one that had a mass on a string and you spin it around, they don't give you a mass, they just ask what speed was needed to make a full vertical circle? if it's not mg = m(v^2)/r, therefore v= (rg)^(1/2), tell me what it is.
I'm doing fine in the in class tests as well as the labs but these online assignment just frustrate the hell out of me.
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If the mass is not given, it likely cancels out. I think in what you just gave, the mass cancelled out so you don't need it.