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A soccer ball is kicked with the initial speed of 10.6 . After 0.770 it is at its highest point. What was its initial direction of motion?
 Feb 15, 2012
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y(t) = v0*t*sin(beta)-(g/2)*t^2
ys = ((v0)^2*sin(beta)^2)/(2*g)

[input]solve( ((10.6)^2*sin(beta)^2)/(2*9.81) = 10.6*0.770*sin(beta)-(9.81/2)*0.770^2, beta)[/input]
{beta=0.793147643704485, beta=0.793284492082275}
but this in RAD.
[input]0.793 / (pi/180)[/input]
= 45.43° ?
 Feb 15, 2012

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