Vo = 12m/s[20o]
Xo = 12*cos20 = 11.28 m/s.
Yo = 12*sin20 = 4.10 m/s.
Y = Yo + g*Tr = 0 @ max. ht.
4.10 - 9.8Tr = 0
-9.8Tr = -4.10
Tr = 0.419 s. = Rise time.
Tf = Tr = 0.419 s.
T = Tr + Tf = 0.419 + 0.419 = 0.838 s.=
Time in air.
A track star in the long jump goes into the jump at 12 m/s and launches herself at 20.0° above the horizontal. How long is she in the air before returning to Earth? (g = 9.81 m/s2)
4 answers
13m
superb
Displacement is 9.24m