Good day folks,
Just doing some reading about cartesian dot product etc.
I realise i x j = k, i x i = 0 etc.
Can someone tell me if there are relations for i + i and i/i ?
I apologise - I am a bit rusty with this stuff...
Solving for Vca.
-Vci = (3k) x (0.4i + 0.4j) + ((Vca)cos45i + (Vca)sin45j)
=> -Vci = -1.2i + 1.2j +0.7(Vca)i + 0.7(Vca)j
=> -Vc = -1.2 + 0.7(Vca)
=> 0 = 1.2 + 0.7(Vca)
=> Vca = -1.697 m/s
=> Vc = 2.4 m/s.
I hope that clears it up. I also hope you can assist me further...
is that a cross product at the start?. what does "k" represent?
why don't you "copy" the original problem, upload it to imageshack, and post it as a link so that someone can make sense of it?