Saturday, 29 April 2017

homework and exercises - A pearl that moves in a smooth vertical hoop (Circular motion)



I couldn't understand something about the situation of a pearl that moves in a smooth vertical hoop in circular motion. When the normal force equals 0 , the pearl didn't disconnect from the smooth vertical hoop, even though the pearl had velocity at that point. Why the pearl didn't disconnect?



Answer



It had a tangential velocity and its weight was enough to provide the centripetal force for motion.


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