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June 19, 2013

# Homework Help: physics

Posted by meghan on Thursday, September 22, 2011 at 12:08am.

a student drops a ball from a window 3.5m above the sidewalk. the ball accelerates at 9.80m/s^2. How fast is it moving when it hits the sidewalk.

• physics - Henry, Friday, September 23, 2011 at 4:54pm

Vf^2 = Vo^2 + 2g*d,
Vf^2 = 0 + 19.6*3.5 = 68.6,
Vf = 8.28m/s.

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