Answer:
a) 75°
b) 72° (with drag coefficient = 2 and altitude = 1 m)
c) 63° (with initial speed = 14 m/s)
80° (initial speed = 22 m/s)
83° (initial speed = 26 m/s)
Explanation:
By using projectile motion simulator from the website, "http://phet.colorado.edu/sims/projectile-motion/projectile-motion.swf", desired answers can be found accordingly.
a) When we need to arrange degree at 75° , it hits the bull's eye.
b) By adding air resistence with drag coefficient = 2 and altitude = 1 m,
to hit the bull's eye, we need to arrange degree at 72°
c) With initial speed = 14 m/s, we need to arrange degree at 63°
With initial speed = 22 m/s, we need to arrange degree at 80°
With initial speed = 26 m/s, we need to arrange degree at 83°
So, as the initial speed increases, the angle also increases.
