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QUESTION

You throw a ball upward with an initial speed of 4.4 {\rm m/s}. When it returns to your hand 0.

You throw a ball upward with an initial speed of 4.4 {rm m/s}. When it returns to your hand 0.90 {rm 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?

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