A ball is thrown vertically upwards with an initial velocity of 20 m/s. How long does it take to reach a height of 75 m? (g=10 m/s2).


a) 2 s y 4 s
b) 3 s y 5 s
c) 3 s y 6 s
d) 5 s y 8 s
e) 5 s y 15 s