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![[Post New]](/templates/default/images/icon_minipost_new.gif) 4 May 2008 19:19:56 IST
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Just give me one reason why it must pass through the centre of mass... if it happens, you would never be able to make a turn with your bike... (if you ride one)
Normal reaction may be acting anywhere from one end to the other.....
It shifts from one point to another to balance out any net torque that is being produced, better read HC Verma - somewhere at the end of Friction or rolling I guess..... you'd find the reason why a rolling sphere ever stops....
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