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January 29, 2015

January 29, 2015

Posted by **George** on Sunday, December 19, 2010 at 9:31pm.

- physics -
**bobpursley**, Sunday, December 19, 2010 at 9:49pmF=ma is needed in rotational form

F*radius= I *angluar acceleration

Now F=mg-ma where a is acceleration.

(mg-ma)radius= I * a/r (angular acceleration is a/r)

look up I for a solid disk, solve for a.

Now, how much time:

distance=1/2 a t^2 solve for t.

- physics -
**George**, Sunday, December 19, 2010 at 10:09pmI had completed the problem correctly until when finding I for a solid disk I used 1/4 instead of 1/2. Thank you

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