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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 xdirection.
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.
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 xdirection. 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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beginnersmind
 one year ago
Best ResponseYou've already chosen the best response.2dw:1442102254986:dw Is this what we're talking about?

beginnersmind
 one year ago
Best ResponseYou've already chosen the best response.2"the particle is moving in the xdirection." This can be written as: The particle's velocity has a 0 component in the ydirection. I.e. it looks something like v(t) = constant * i + zero * j
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