Homework Help: physics

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

A person with a mass of 60kg climbs up to a diving board 4 meters above a swimming pool. what is the divers speed when entering the water?
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 10:16am
Ans. 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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