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Physics 25 Online
OpenStudy (anonymous):

The velocity of a ball as it is thrown Up is 20 m/s. It attains zen velocity after 3.5 seconds. What is the average acceleration of the ball during its upward flight? A 5.7 m/s B 0.57 m/s C -0.57 m/s2 D -5.7 m/s2 E 5.5 m/s2

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