A tennis ball is served 2.00 degrees above the horizontal at a height of 2.40 meters, 12.0 meters from
a net that is 0.900 meters high.
(a) If the tennis ball is to clear the net by at least 0.200 meters, what is its minimum initial velocity?
(b) If the tennis ball clears the net by 0.200 meters, where will it land?
1)
12 = vo cos2 t
-1.8 = vo sin2t -4.9t^2
two eq, two unknowns.
2) find time to fall .2 m. Use vo cos2 times that time and add to the 12 you've gone already.