Posted by **Anonymous** on Thursday, October 27, 2011 at 12:03am.

An autographed baseball rolls oﬀ of a 0.82 m

high desk and strikes the ﬂoor 0.28 m away

from the desk.

How fast was it rolling on the desk before

it fell oﬀ? The acceleration of gravity is

9.81 m/s

2

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