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Physics 8 Online
OpenStudy (anonymous):

A ball is thrown vertically upward with a speed of +18.0 m/s. (a) How high does it rise? Correct: Your answer is correct. m (b) How long does it take to reach its highest point? Correct: Your answer is correct. s (c) How long does the ball take to hit the ground after it reaches its highest point? Incorrect: Your answer is incorrect. Your response differs from the correct answer by more than 100%. s (d) What is its velocity when it returns to the level from which it started? m/s

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