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January 31, 2015

January 31, 2015

Posted by **bobjahng2** on Thursday, November 11, 2010 at 12:56am.

- physics -
**bobpursley**, Thursday, November 11, 2010 at 9:29amwell, what you know

Vertical

hf=ho+vi*t-4.9t^2

135=0+VsinTheta*t-4.9t^2

Horizontal:

195=VcosTheta*t

Ok, t=6.5 so

VcosTheta= 195/6.5

in the vertical equation, solving for VsinTheta=(135+4.9*6.5^2)/6.5

then tanTheta= Vsintheta/VcosTheta, so figure out theta.

then go back knowing theta and figure V.

check my work, I did it in my head.

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