A ball is thrown horizontally from the top of a 63.5-m building and lands 120.8 m from the base of the building. Ignore air resistance. (Assume the ball is thrown in the +x direction and upward to be in the +y direction.)   a) How long (in s) is the ball in the air?   b) What must have been the initial horizontal component of the velocity (in m/s)? (Indicate the direction with the sign of your answer.)   c) What is the vertical component of the velocity (in m/s) just before the ball hits the ground? (Indicate the direction with the sign of your answer.)   d) What is the velocity (in m/s) (including both the horizontal and vertical components) of the ball just before it hits the ground?

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Projectile Motion