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calculate the average acceleration of an object that moves from a speed of 45m/s to 69m/s in 6 seconds.
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the average acceleration can be calculated using the formula a = (vf - vi)/t, where vf is the final velocity, vi is the initial velocity, and t is the time elapsed. in this case, the average acceleration is (69 - 45)/6 = 8 m/s/s.
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