Would it be:
A × B = 17i - 19j - 33k
A · B = 10 + 7 + 6 = 23I've moved on to finding magnitudes.
Calculate the magnitude of A = (5, -4, 3)
[(5^2) + (-4^2) + (3^2)]^1/2 = (50)^1/2 Is that correct?
If I find the magnitude of |A × B| it would be:
A × B = 17i - 19j - 33k
[(17^2) + (-19^2)...
Oh, I guess I did mix them up. So, are the values I got for i, j, and k incorrect? I've been looking at the dot product and it seems much easier than the cross product.
If I were to get the dot product of my original equation:
A = (2i - 3j + 7k)
B = (5i + j +2k)
A dot B = 10 + (-3) + 14
is...
I just looked at a cross product video on Youtube and am now trying to solve questions from my textbook.
Currently this one:
A = (2i - 3j + 7k)
B = (5i + j +2k)
From the math I've done, I have calculated AxB to be 35. Is that correct?
i = -13
j = 31
k = 17
I feel slightly more confident...
This is straight from the textbook:
"From the geometric point of view, a vector is a directed line segment. In order to describe a vector we must specify both its length and direction. If two vectors have the same length and and the same direction they are equal."
Connect the tail of vector A...
Freshman in college. There's no way I can work out the problems if I don't get the concepts. What I need help with is understanding the concepts. Only then can I begin to work out a problem.
That would be the equivalent of someone coming to me and asking if I can help them build a computer. My...
My final for Physics is coming up and I really, really ****ed up in this class. I don't even know how to do dot products, cross products, or let alone Newton's laws. We applied Newton's laws to some pulley problems I think. I've been going to all the lectures but it just doesn't stick -- nothing...
Yeah I think you might be right. The half-point is 25.5km and it would take each train .75 hours (40 minutes) to collide. The bird's velocity is a given 60km/h so you would multiply 60(.75) to get 45km.