A man has two rocks and throws the first one straight up ten meters high. At the instant the first rock reaches it's highest point, the man throws the second rock upward with the same in initial speed as the first. (a) What was the initial velocity of the first ball? (b) How long will it take the second ball to pass the first? (c) At what height will the two balls pass one another? (d) At that time, which ball is traveling faster? (e) How long was the first ball in the air?
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