Uni Stuff > Physics
umep physics thread
kamil9876:
hey /0, i read your post late last night and did it twice. Once i got 5/7 first time the other time i got 1/5. The correction i made was that the formula for the rotational inertia has L not R. Hence d not d/2
/0:
aaah I see, thx heaps kamil and evaporade :D
/0:
If a hollow cylinder rolls down a frictionless hill, what is the ratio of its final centre-of-mass velocity compared to a hollow cylinder rolling down a hill with friction?
Both cylinders have mass , radius , and the hills are both height .
I don't see what the difference is mathematically... They both have the same torque so in both cases?
dcc:
--- Quote from: /0 on June 15, 2009, 03:48:48 pm ---If a hollow cylinder rolls down a frictionless hill, what is the ratio of its final centre-of-mass velocity compared to a hollow cylinder rolling down a hill with friction?
Both cylinders have mass , radius , and the hills are both height .
I don't see what the difference is mathematically... They both have the same torque so in both cases?
--- End quote ---
If there is no friction, what is providing the torque?
/0:
gravity?
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