- #1
arman.raina
- 5
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I'm learning vectors. I read somewhere that if a vectors magnitude is constant, then its derivative is perpendicular. However, in polar co-ordinates, I learned something else.
The distance of a particle in orbit from a focus is r. if /r/ varies with t even then dr/dt is v and it is perpendicular to r. Further if /v/ varies, then dv/dt is a and is is perpendicular to v and parallel to r. Must the magnitude of the vector be constant or not for the derivative to be perpendicular?
The distance of a particle in orbit from a focus is r. if /r/ varies with t even then dr/dt is v and it is perpendicular to r. Further if /v/ varies, then dv/dt is a and is is perpendicular to v and parallel to r. Must the magnitude of the vector be constant or not for the derivative to be perpendicular?