- #1

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The position vector r of a particle moving in the x - y plane given by r = (2t^3)i + (6-7t^4)j, where r is in meters and t is in seconds.

Calculate

r

v

a

when t = 2s

Now, I'm pretty sure I know how to do it, but I don't get a second chance once I turn the homework in! :)

So in the original equation, r is meters. So I'm thinking this is the displacement.

If this is the displacement, I just plug in 2 for t and solve.

Because that's the displacement, I can find a and v from the derivatives of the original function.

Is this correct?