Question

Two vectors lying in the xy plane are given by the equations \(\vec A = 5\hat i + 2\hat j\) and \(\vec B = 2\hat i - 3\hat j\). The value of \(\vec A \times \vec B\) is what?

Answer 1

i thought it would be \[(5\times 2)\hat i + (2 \times -3)\hat j \implies 10\hat i - 6\hat j\]
but it seems im wrong...

Answer 2

@curiousshubham do you know this shiz?

Answer 3

you are right..... now its 10 - 6 = 4.

Answer 4

well the weird thing is...the choices are
\[A. \; 19 \hat k\]
\[B \; -11 \hat k\]
\[C \; -19 \hat k\]
\[D \; 11 \hat k\]

Answer 5

any ideas?

Answer 6

there's no relation between the unit vector k here....

Answer 7

that's why i say it's weird

Answer 8

@lgbasallote Where did you find this simple ques with weird options???

Answer 9

same one i have been getting my vector questions from

Answer 10

says the answer is C

Answer 11

no idea @curiousshubham ?

Answer 12

wow

Answer 13

I was there..... Good Job @demitris ...

Answer 14

so..can you explain what he did?

Answer 15

nevermind..i got it