Question

Assume air resistance is negligible unless otherwise stated.
A coin is dropped from a hot-air balloon that is 250 m above the ground and rising at 14.0 m/s upward. For the coin, find the following.
(a)
the maximum height (in m) reached

(b)its position and velocity (in m and m/s, respectively) 3.90 s after being released (Assume that the +x-axis is to the right and the +y-axis is up along the page. Indicate the direction with the sign of your answer.)

c)the time (in s) before it hits the ground