Vo = 120m/s[30o]
Xo = 120*cos30 = 103.9 m/s.
Yo = 120*sin30 = 60 m/s.
a. Y = Yo * g*Tr = 0
Tr=-Yo/g = -60/-9.8 = 6.12 s. = Rise time.
h = ho + (Y^2-Yo^2)/2g
h = 35 + (0-(60^2))/-19.6 = 218.7 m.
h = 0.5g*t^2 = 218.7
4.9t^2 = 218.7
t^2 = 44.63
Tf = 6.68 s. = Fall time.
Tr+Tf = 6.12 + 6.68 = 12.8 s. = Time in
b. d = Xo*(Tr+Tf) = 103.9m/s * 12.8s =
c. Y^2 = Yo^2 + 2g*h
Y^2 = 0 + 19.6*218.7 = 4286.52
Y = 65.5 m/s.
Tan A = Y/Xo = 65.5/103.9 = 0.63041
A = 32.2o
TYPO: Change Y = Yo*g*Tr = 0 to
Y = Yo + g*Tr = 0
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