A small rock is thrown vertically upward 18m/s from the edge of the roof of a 37.0-m-tall building.

A small rock is thrown vertically upward with a speed of
18.0 m/s from the edge of the roof of a 37.0-m-tall building. The
rock doesn’t hit the building on its way back down and lands on
the street below. Ignore air resistance. (a) What is the speed of the
rock just before it hits the street? (b) How much time elapses from
when the rock is thrown until it hits the street?

Hey everyone I made a mistake at 4:39 in the video. The 32.7 is supposed to be negative because the ball is traveling downwards and not upwards. So when we subtract 22 from both sides it does become -54.7. The answer is still correct, but I forgot to put the minus sign on the 32.7. Sorry about that. .