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A squash ball with an initial velocity of 25(m)/(s)[W] is hit by a squash racket, changing its velocity to 29(m)/(s)[E] in 0.25s. What is

A squash ball with an initial velocity of 25(m)/(s)[W] is hit by a squash racket, changing its velocity to 29(m)/(s)[E] in 0.25s. What is the squash ball's average acceleration?

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