A hot air balloon rises from the ground with a velocity of 1.8 m/s.A champagne bottle is opened to celebrate takeoff, expelling thecork horizontally with a speed of 4.0 m/s. When opened, the bottleis 5.0 m above the ground. (Neglect air resistance.)
(a) What is the initial velocity of the cork, as seen by anobserver on the ground?
Magnitude
________ m/s
Direction
________° above the horizontal
(b) Determine the maximum height above the ground attained by thecork.
_________ m
(c) How long does the cork remain in the air?
_________ s