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Motion under gravity explained

A 2-kg object is thrown upwards with an initial velocity of +20 m/s and travels in free-fall motion.
a. Diagram the forces acting upon the ball after it leaves the hand of the thrower. As in all free-body diagrams, label every force according to type.
b. Calculate the acceleration of the ball.
c. Calculate the speed of the ball after 3.0 seconds.
d. Calculate the distance traveled after 4.0 seconds.