(Steps Shown) You throw a ball upward with an initial speed of 3.9 m/s . When it returns to your hand 0.80 s later, it has the same speed in the downward
Question: You throw a ball upward with an initial speed of 3.9 m/s . When it returns to your hand 0.80 s later, it has the same speed in the downward direction (assuming air resistance can be ignored). What was the average acceleration vector of the ball? (Take up to be positive.)
Enter scientific notation as 1.23E4.
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