The horizontal velocity remains unchanged, but the vertical changes.
In the vertical
vf=30-9.8t
find the vertical velocity, add it to the horizontal as VECTORS.
a ball is thrown into the air with an initial velocity of 30m\s and a horizontal velocity of 10m\s. What's it's speed after 4 seconds?
3 answers
.....huh? that would make the vertical velocity negative
of course: negative means downward.