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physics

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A ball is dropped from a high building. Using the approximate value of g = 10 m/s2, find the change in velocity between the fourth and seventh second of its flight

  • physics -

    find v(7) : v(7)=10*7=70
    find v(4) : v(4)=10*4=40

    calculate the change.

  • physics -

    30 is the change

  • physics -

    30m/s

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