Recent content by mfactor

Consider a woman standing on a turntable, which can turn without any friction. Both are initially at REST. A woman (m kg) starts to walk around the rim of turntable clockwise. she walks at a constant velocity with respect to the earth. Obviously, the turntable (I kgm^2) starts to rotate...

OK, so for a small particle, \Sigma F=ma is very straight forward. If two forces are applied to that particle, the particle accelerates, which is determined by the summation of the forces applied. But what if the object is extended one, say, a solid uniform rod (1 kg). Also, imagine that...

Thanks. I got it.

Yes, I had understood that even an object moving in a straight line has an angular momentum with respect to a certain point. The red portion was what I thought it was. Yes, the object is "revolving" but not "rotating," hence no rotational kinetic energy. Revolving is just another case of...

I meant rotational kinetic energy. Pardon my omission of the word "kinetic" I edited the title of this thread to include "kinetic"

Angular momentum without rotational kinetic energy? Consider a particle (a ball or electron or whatever you like) that moves in a perfect circle with constant angular and tangential velocity about a fixed point in space. This particle does not spin about itself. The movement is perfectly...