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cgbork

  • one year ago

A particle's position is r(vector) =(ct^2−2dt^3)i^+(2ct^2−dt^3)j^, where c and d are positive constants. Find expressions for times t > 0 when the particle is moving in the x-direction. Express your answer in terms of the variables c and d. can anybody walk me through how to even approach this problem? I am totally lost.

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  1. beginnersmind
    • one year ago
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    |dw:1442102254986:dw| Is this what we're talking about?

  2. beginnersmind
    • one year ago
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    "the particle is moving in the x-direction." This can be written as: The particle's velocity has a 0 component in the y-direction. I.e. it looks something like v(t) = constant * i + zero * j

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