Physics

A particle experiences a constant acceleration that is north at 100m/s^2. At t=0, its velocity vector is 70m/s east. At what time will the magnitude of the velocity be 100m/s?
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  1. I will be happy to critique your thinking.

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    bobpursley
  2. The east component will remain
    Vx = 70 m/s

    The west componen is
    Vy = (1/2) a t^2 = 50 t^2

    |V|= 100 when Vx^ + Vy^2 = 10^4 m^2/s^2

    Write that equation in terms of t and solve for t.

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