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Posted by **neshia** on Wednesday, May 9, 2012 at 2:03am.

A 8.9m/s

b 6.2m/s

c 4.4m/s

d 3.3m/s

e 2.1 m/s

- physics -
**Elena**, Wednesday, May 9, 2012 at 10:16amAns. A

PE =KE

m•g•h = m•v²/2

v =sqrt (2•g•h) =

sqrt(2•9.8•4) = 8.9 m/s

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