All categories - 23 February 2007

I need help with part b, I know part a.

An athlete executing a long jump leaves the ground at a 35 degree angle & travels 6.8m.
a) what was the takeoff speed? 8.3.
b)If this speed were increased by just 2%, how much longer would the jump be?.

So far this is what I did but I got the wrong answer....
8.3 x .02 = .166 --> V0=8.3 + .166=8.466..
Vx0=8.466cos(35)=6.93
Vy0=8.466sin(35)=4.85

y=y0 + Vy0t + .5(-9.8)(t^2)

help am i doing it right?

2007-02-23 12:01:41 · 2 answers · asked by Anonymous in Physics

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