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February 28, 2015

February 28, 2015

Posted by **jim** on Thursday, March 8, 2012 at 1:18pm.

Express your answer with the appropriate units

- physics -
**Elena**, Thursday, March 8, 2012 at 3:00pmThe motion of jumping person is similar to projectile motion:

H=(Vo)^2•(sinα)^2/2g

L=(Vo)^2•(sin2α)/2g=

=(Vo)^2•(2sinα•cosα)/2g.

2H/L=sinα/cosα,

tanα=2H/L=21.23/2=1.23

α=arctan1.23=50.9°

Vo=sqr(2gH)/ sinα=6.33 m/s.

t=2Vo•sinα/g=1 s.

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