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A particle is moving with the given data. Find the position of the particle.

a(t) = 2t + 5, s(0) = 2, v(0) = −4
s(t) = ?

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2 answers

  1. a(t) = 2t + 5
    v(t) = t^2 + 5t + c
    given: when t=0 velocity = -4
    -4 = 0 + 0 + c
    c = -4, so
    v(t) = t^2 + 5t - 4
    s(t) = (1/3)t^3 + (5/2)t^2 - 4t + k
    when t = 0, s(0) = 2
    2 = 0 + 0 + 0 + k, so k = 2, and finally

    s(t) = ......

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  2. Hummm, looks a lot like the Allison problems down below.

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