physics.pls help

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can you help me to isolate the ''t'' in this formula.

pls help

  • physics.pls help -

    d = V1*t + 0.5at^2 = 0,
    Factor out t:
    t(V1 + 0.5at) = 0,
    t = 0.

    V1 + 0.5at = 0.
    0.5at = -V1,
    t = -Vi / 0.5a.

    This Quadratic Eq has 2 solutions:
    t = o, and t = -V1 / 0.5a.

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