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18 June, 08:25

8. Which would take more force to stop in 10 seconds: an 8 kg ball rolling at 0.2

m/s, or a 4 kg ball rolling at 1.0 m/s?

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  1. 18 June, 08:46
    0
    Force = mass • acceleration

    1) Find acceleration

    -) 8kg ball

    a = v/t

    a=.2 / 10 =.02 m/s^2

    Force = 8kg •.02 =.16N

    -) 4kg ball

    a = v/t

    a = 1.0 / 10 =.1 m/s^2

    Force = 4kg •.1 =.4N

    Answer: The 8kg ball would need more force because it requires. 16N, while the 4kg only need. 4N.
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