Sunday

April 20, 2014

April 20, 2014

Posted by **lenny** on Sunday, April 8, 2012 at 12:51pm.

plzzz help!

- physics-HS -
**Elena**, Sunday, April 8, 2012 at 1:49pm77 km/h = 21.4 m/s

m•g•h+m•v^2/2 = m•g•H

H = h+v^2/2•g = 49 +(21.4)^2/2•9.8 =72.4 m

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