Question

Find a vector of magnitude 8 in the direction v = 10i - 15j.

Answer 1

take the magnitude of the given vector: sqrt((10)^2+(-15)^2)=sqrt(325)

v/sqrt(325)=10/sqrt(325) (i)-15/sqrt(325)(j)

Multiply both componets by 8: 80/sqrt(325)(i)-120/sqrt(325)(j)

Answer 2

you can verify this by taking the magnitude of :

80/sqrt(325)(i)-120/sqrt(325)(j)

It should give you 8 :)

Answer 3

I figured it out right after posting! Your answer was right, thanks! :)

Answer 4

cool