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physics

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a body travels half of its total path in the last second of its free fall from rest.what is the duration of fall .

  • physics - ,

    0.5d = Vo*t + 0.5gt^2,
    0.5d = 0 + 0.5*9.8(1)^2,
    0.5d = 4.9,
    d = 9.8m.

    d = Vo*t + 0.5gt^2 = 9.8m,
    0 + 0.5*9.8t^2 = 9.8,
    4.9t^2 = 9.8,
    t^2 = 2,
    t = 1.414s.

  • physics - ,

    mistake)) it has initial velocity

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