- #1
Dante Tufano
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1. A football kicker can give the ball an initial speed of 26 m/s. He is 47 m from the goalpost which has a crossbar 2.69 m high.
(a) What is the smallest angle of elevation that he can kick the football and score a field goal?
1°
(b) What is the largest angle of elevation that he can kick the football and score a field goal?
2°
2. x-xo=(vocos(theta))t
y-yo = (v0sin(theta))t-(1/2)gt^2
vy=vosin(theta)-gt
vy^2=(vosin(theta))^2-2g(delta y)
delta y = (tan(theta))(delta x) -(g(delta x)^2)/(2*(vocos(theta))^2)
v^2=v0^2-2g(y-y0)
3. I honestly have no idea how to solve this. I tried to plug my values into the equation v^2=v0^2-2g(y-y0) to get some idea of what the velocity at the goal would be, but I'm not even sure if I need that information or what to do afterwards. Please help give me some direction.
(a) What is the smallest angle of elevation that he can kick the football and score a field goal?
1°
(b) What is the largest angle of elevation that he can kick the football and score a field goal?
2°
2. x-xo=(vocos(theta))t
y-yo = (v0sin(theta))t-(1/2)gt^2
vy=vosin(theta)-gt
vy^2=(vosin(theta))^2-2g(delta y)
delta y = (tan(theta))(delta x) -(g(delta x)^2)/(2*(vocos(theta))^2)
v^2=v0^2-2g(y-y0)
3. I honestly have no idea how to solve this. I tried to plug my values into the equation v^2=v0^2-2g(y-y0) to get some idea of what the velocity at the goal would be, but I'm not even sure if I need that information or what to do afterwards. Please help give me some direction.