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Posted by 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

  • physics - , Thursday, October 27, 2011 at 8:03am

    0.28 m = (horizontal velocity component)*(fall time)

    The fall time is sqrt(2H/g) = 0.4089 s

    H = 0.82 m

    Solve for the horizontal velocity component

    0.685 m/s

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