The football is kicked from ground with the resultant velocity of 30m/sec at the angle of 40 degrees from horizontal. Find:
i. Find time when the ball is in air
ii. how high it goes?
iii. how far it goes?
iv. if ball is kicked from 40 yd line, it crossed over upright?
v. how do answers changes if velocity is changed by +/- 10%
vi. How do answers changes if angel is changed by +/- 10%?