Question

How do you find the components of a resultant vector using dot product?

Answer 1

Is this two dimensions or three dimensions.

Answer 2

2 dimension and I'm given angles

Answer 3

Please provide the problem in question.

Answer 4

Using the dot product, find the components of the velocity vector v=20i+12j km/h in the x' and y' axes

Answer 5

Well, I suppose x = 1i and y = 1j. Do you know the formula for dot product?

Answer 6

Yes, just the question gives me the angle of 60 degrees from the x axis to x' and the angle 150 from the x axis to y'

Answer 7

And vector v, seems to be 30 from the x axis, I would've drawn this, but I'm doing this off of my phone, it's a little hard.

Answer 8

I do not see why you would have to use the dot product. It tells you the components in the x and y direction when it gives you the vector.

Answer 9

Yes, that's what I did, so I found them using vx=vcos30, so I don't know how I would use dot product