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April 20, 2014

April 20, 2014

Posted by **HELP** on Friday, October 12, 2012 at 1:38pm.

Please need help! you just have to show me how I can solve this problem

- physics -
**Elena**, Friday, October 12, 2012 at 2:00pmv₀(x)=v₀•cosα =3.1• cos15º=3 m/s

v₀(y)=v₀•sinα=3.1•sin15 º =0.8 m/s

h= v₀(y) •t+gt²/2.

9.8t²+0.8t-0.82 =0

t= {- 0.8±sqrt(0.8²+4•9.8•0.82)}/2•9.8,

The positive root is t = 0.25 s.

v(x)= v₀(x)

x= v₀(x) •t=0.75 m

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