Categories > Motion in A Straight Line > Motion under Gravity > A man throws a ball vertically upward and it rises through 20 m and returns to his hands. What was the initial velocity \[(u)\] of the ball and for how much time \[(T)\] it remained in the air \[[g = 10m/{s^2}]\]

Motion in A Straight Line

Question: A man throws a ball vertically upward and it rises through 20 m and returns to his hands. What was the initial velocity \[(u)\] of the ball and for how much time \[(T)\] it remained in the air \[[g = 10m/{s^2}]\]


1) u = 10 m/s, T = 2s
2) u = 10 m/s, T = 4s
3) u = 20 m/s, T = 2s
4) u = 20 m/s, T = 4s
Solution: Explanation: Explanation
Motion under Gravity

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