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27 November, 16:56

A ball rolls down a ramp for 15 seconds. If the initial velocity of the ball was 0.8m/s and the final velocity was 7m/s, what was the acceleration of the ball?

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  1. 27 November, 17:11
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    Acceleration = (change in speed) / (time for the change)

    Change in speed = (ending speed) - (starting speed)

    = (7.0 m/s) - (0.8 m/s) = 6.2 m/s

    Time for the change = 15 seconds

    Acceleration = (6.2 m/s) / (15 sec)

    = (6.2/15) m/s²

    = 0.413 m/s²
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