Theta=?
a person in the passenger basket of a hot-air balloon throws a ball horizontally outward from the basket with speed 10 m/s
what initial velocity (magnitude and direction) does the ball have relative to a person standing on the ground if the hot-air balloon is rising at 2.8 m/s?
what initial velocity (magnitude and direction) does the ball have relative to a person standing on the ground if the hot-air balloon is descending at 2.8 m/s relative to the ground?

theta=?