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10 October, 01:43

A rock is rolling down a hill. At position 1, its velocity is 2.0 m/s. Twelve seconds later, as it passes position 2, its velocity is 44.0 m/s. What is the acceleration of the rock?

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  1. 10 October, 01:51
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    As this happens over twelve seconds, you would take the total difference in velocities and divide it by twelve to find the change per second

    44.0 m/s - 2.0 m/s = 42.0 m/s

    42.0 m/s / 12 s = 3.5 m/s2

    the acceleration of the rock would be 3.5 m/s2
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