Thursday, October 27, 2016

newtonian mechanics - How can tangential acceleration from a radial force be explained?


A mass is attached to a rope, and put into a circular motion. If I pull the string from the center, the tangential speed of the mass will increase (by conservation of angular momentum).


I am applying a force only in the radial direction, so how can the tangential velocity increase if there is no tangential force?




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