Answer:
v2 = 19.79m/s
Explanation:
Okay, lets write down everything we have;
v1 = 25m/s [up]
v2 = ?
d = 11.9 [up]
a = 9.8 [down]
So the formula we will use is v2^2 = v1^2 + 2ad. We also have to make acceleration negative, so everything can have the same direction of up:
v2^2 = v1^2 + 2ad
v2^2 = (25)^2 + 2(-9.8)(11.9)
v2^2 = 625 - 233.24
v2^2 = 391.76
v2 = 19.79m/s
