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View Full Version : Kollizion induced spin.



cushioncrawler
02-09-2011, 03:53 PM
If u hold a ball and giv a glancing quarterball blow to a polkadot ball, u shood be able to momentaryly see the polkadot ball rolling away with some sidespin.
If the axis of rotation iz horizontal then the polkadot ball haz zero spin. But with a glancing blow u shood see the axis praps up to 1 in 8 off horizontal.

By rubbing chalk at the kontakt on the handball and on the polkadot ball, i kan get the axis near'nuff 1 in 1 off horizontal, ie 45dg.
I think that chalk-kix kan hav balltoball friktion up to 5 times ordinary friktion.
mac.