physics

The magnitude of A=(-4m)x+(-2m)y=

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  1. are you using x,y to mean unit vectors that are 90 degrees apart? If so

    mag(a)=sqrt(-4m)^2 + (-2m)^2
    =sqrt (20m^2) and you can finish it.

  2. how do i finish it?

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  3. If you do not know how to get the square root of (20*m^2), you will need a tutor immediately.

    sqrt(20m^2)=m*sqrt(4*5)=2m*sqrt(5)

    Good luck with physics. I strongly recommend a tutor before you are lost.

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