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cantgetaname
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I was solving this question in rotational mechanics (not asking for help).
Now, he obviously assumed the object rolled on the surface, which, if I'm not wrong can only happen on a surface that offers some friction.
So my question is...
Can we really apply energy conservation here as a non-conservative force is involved?
It doesn't look like to me that the work done by the friction force will be zero.
EDIT: Oh...the thread title probably isn't the most accurate. I'm quite sure it won't roll on a frictionless surface.
The author then goes to solve this using energy conservation, equating the final kinetic and rotational energy to the initial potential energy.A cylinder of mass m, radius r, is released from rest from the top of the inclined plane of inclination [tex]\theta[/tex] and length l.
Find the speed of the cylinder when it reaches the bottom.
Now, he obviously assumed the object rolled on the surface, which, if I'm not wrong can only happen on a surface that offers some friction.
So my question is...
Can we really apply energy conservation here as a non-conservative force is involved?
It doesn't look like to me that the work done by the friction force will be zero.
EDIT: Oh...the thread title probably isn't the most accurate. I'm quite sure it won't roll on a frictionless surface.
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