Quote (Logarius @ Nov 28 2017 08:38pm)
a) y(t) = 120ft/sec(sin30t)-16t^2 + 5.5 ft = 0
120(sin30)-16t^2 = -5.5
60-16t^2=-5.5
-16t^2=-65.5 (multiply each side by -1)
16t^2=65.5
t^2=65.5/16
square root(t^2)=square root(65.5/16)
t=2.02 seconds
x(2.02) =120(cos30)x2.02 seconds = 103.92 feetx2.02 = answer = 209.92 feet
Good luck with rest. I'm also not 100 percent certain I'm correct.
b and c should be 45 degree angles. But not sure on proof or expressions since it's been a while.
This post was edited by WXdisaster on Nov 28 2017 08:19pm