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Introductory Physics Homework Help
Finding the expression for the x-component of velocity (vectors?)
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[QUOTE="ashhlyn, post: 6122892, member: 656533"] [h2]Homework Statement [/h2] a particle's position is the vector r=(ct^2-2dt^3)i+(4ct^2-dt^3)j where c and d are positive constants. find the expression for the x-component of the velocity (for time t>0) when the particle is moving in the x-direction. you should express your answer in terms of variables c and d. [h2]Homework Equations[/h2] (vector)r=(ct^2-2dt^3)i+(4ct^2-dt^3)j is the only given equation [h2]The Attempt at a Solution[/h2] I'm confused on what this problem is asking I can derive the position vector to get v=(2ct-6dt^2)i+(8ct-3d^2)j but what is the question asking? I thought the x-component would be 2ct-6dt^2 but that was wrong. thank you much for any help EDIT: when I put the wrong answer in the hint is "first fine the velocity vector and use this to determine the times when the particle is traveling in the x direction) [/QUOTE]
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Introductory Physics Homework Help
Finding the expression for the x-component of velocity (vectors?)
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