An archer shoots an arrow with a velocity of 45 meter per second at an angle of 50 degree with the horizontal. An assistant standing on the level ground 150 meter downrange from the launch point throws an apple straight up with the minimum initial speed necessary to meet the path of the arrow.
(a) Evaluate the initial speed of the apple?
(b) Find at what time after the arrow launch should the apple be thrown so that the arrow hits the apple?