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anonymous
 4 years ago
A ballplayer catches a ball 3.0s after throwing it vertically upward. With what speed did he throw it, and what height did it reach?
Answer: 15 m/s and 11m
anonymous
 4 years ago
A ballplayer catches a ball 3.0s after throwing it vertically upward. With what speed did he throw it, and what height did it reach? Answer: 15 m/s and 11m

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0the anwer is wrong. :/

TuringTest
 4 years ago
Best ResponseYou've already chosen the best response.0The numbers are approximate, but not totally wrong. At the top v=0 and the time past will be half the total time given, so we have\[v=v_igt=0\to v_i=gt\approx10(1.5)=15m/s\]we can use a kinematic to find the height\[s=v_it\frac12gt^2\approx15(1.5)10(1.5)^2\frac12\approx11\]
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