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September 18, 2014

September 18, 2014

Posted by **Yan** on Sunday, October 7, 2012 at 2:02am.

- Physics -
**Elena**, Sunday, October 7, 2012 at 12:38pmh1= g•t²/2

h2= v₀•t-g•t²/2

h1+h2 =h

g•t²/2 + v₀•t-g•t²/2 =49

t= 49/ v₀=49/20 =2.45 s.

h2= v₀•t-g•t²/2 =20•2.45 -9.8•2.45²/2=

=19.6 m

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