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I read that in kepler's laws of planetary motion that angular momemtum is conserved...
so my question is what is angular momentum???????????????
Dear Aditya
The angular momentum of a particle of mass m with respect to a chosen origin is given by
L = mvr sin θ
or more formally by the vector product
L = r x p
The direction is given by the right hand rule which would give L the direction out of the diagram. For an orbit, angular momentum is conserved, and this leads to one of Kepler's laws. For a circular orbit, L becomes
L = mvr
All the best.
AKASH GOYAL
AskiitiansExpert-IITD
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