Question

I need help finding the dot product of E * F. Here's an image below. I keep on getting 10.4, but it doesn't seem like it should be the correct answer :(
Wouldn't I do 4*3*cos(30)
https://session.masteringphysics.com/problemAsset/1384302/5/knight_Figure_11_02c.jpg

Answer 1

Are you sure it's the product of \(\vec E \cdot \vec F\)? I see \(\vec A\) and \(\vec B\) there

Answer 2

I updated it. https://session.masteringphysics.com/problemAsset/1384302/5/knight_Figure_11_02c.jpg

Answer 3

Wouldn't I do 4*3*cos(30)?

Answer 4

ah, right.

Answer 5

Yes, that's about right.

Answer 6

i got 6

Answer 7

It's all good, guys. I've contacted the book publisher, and it was an error on their side. Thanks, guys. :)