Posted by **Jo** on Monday, October 24, 2011 at 8:28pm.

An autographed baseball rolls off of a 0.85 m

high desk and strikes the floor 0.68 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/s2 .

Answer in units of m/s

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