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January 27, 2015

January 27, 2015

Posted by **James** on Monday, May 21, 2012 at 4:23pm.

- Physics -
**Elena**, Monday, May 21, 2012 at 4:33pmH =g•t²/2 => t =sqrt(2•H/g) = sqrt(2•68/9.8) =3.7 s.

L = v•t => v =L/t = 148/3.7= 39.7 m/s = 143 km/hr =88.8mph

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