Question

In the problem, please assume the free-fall acceleration g = 9.80 m/s2 unless a more precise value is given in the problem statement. Ignore air resistance.

A stone is thrown vertically downward from the roof of a building. It passes a window 15.0 m below the roof with a speed of 24.3 m/s. It lands on the ground 4.75 s after it was thrown.

Answer 1

is there a question in there somewhere?

Answer 2

(a) What was the initial velocity of the stone?

(b) How tall is the building?

sorry I added the question to another post, but here it is. Thanks :)