(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

a football kicker can give the ball an initial speed of 25m/s. what are the least and greatest elevation angles at which he can kick the ball to score a field goal from a point 50m in font of the goalposts whose horizontal bar is 3.44 m above the ground.

2. Relevant equations

d = Vit + 0.5at^2

3. The attempt at a solution

Dx=distance in x direction

Dy=distance in y direction

and so on for Velocity and Acceleration

V = 25m/s

Dy = 3.44m

Vx = 25cos(theta)m/s

Vy = 25sin(theta)m/2

Ay = -9.8m/s^2

t = (Dx)/(Vx) = 50m/(25cos(theta))s

Now plug everything into an equation for Dy

Dy = Vy*t + 0.5Ay*t^2

3.44 = (25sin(theta))(2/cos(theta)) + 0.5(-9.8)(2/cos(theta))^2

I cannot get an answer for theta out of this equation..

The proper answers are 31 degrees and 63 degrees but i dot know how to solve it

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# Homework Help: Minimum and maximum angles

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