Tricky Dynamics Kinematics Trajectory Problem

AI Thread Summary
To determine the minimum angle θ for a football player to successfully kick a 29-yard field goal with an initial velocity of 95 ft/sec, the ball must clear a crossbar that is 10 ft high. The range of the kick is 87 feet, and the challenge lies in calculating the angle that allows the ball to reach this height at the specified distance. The problem suggests that the solution may involve combining equations related to projectile motion, particularly focusing on the height equation having real roots. Visualizing the trajectory can clarify the relationship between the angle, range, and height. This problem requires careful analysis of kinematic equations to find the minimum angle needed for the kick.
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Homework Statement



A football player attempts a 29-yd field goal. If he is able to impart a velocity u of 95 ft/sec to the ball, compute the minimum angle θ for which the ball will clear the crossbar of the goal. The crossbar is 10 ft above the ground. (Hint: Let m = tan θ.)


Homework Equations

I can't find and equation for minimum angle anywhere, which makes me think I have to combine two equations to be able to solve this. I've messed with equations on here, http://hyperphysics.phy-astr.gsu.edu/hbase/traj.html#tracon for hours and I can't figure out what equations I need to combine to get a minimum angle.



The Attempt at a Solution



I know my range is 87 feet, and the height that i want to clear is 10 feet at the end of my range, kicking the field goal at the smallest initial angle possible. Velocity is 95 ft/s

Any help on this is appreciated, it may simply be one of those problems where the solution seems too easy so it is overlooked?
 
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well draw figure and you'll understand that range is not 29 yd
question says that when x= 29 yd ... y should be 10 ft
 
I've had a look at this question, it was by no means easy. Here's a hint: the formula for the height of the ball versus time must have real roots.
 
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