- #1

- 367

- 0

- Thread starter fk378
- Start date

- #1

- 367

- 0

- #2

Defennder

Homework Helper

- 2,591

- 5

- #3

HallsofIvy

Science Advisor

Homework Helper

- 41,833

- 961

The "right hand rule" appears in relation to the cross product of vectors, magnetic fields, etc. What, exactly is your problem?

- #4

- 367

- 0

Find |u x v| and determine whether u x v is directed into the page or out of the page.

|u| = 5 and is directed in the direction of the z-axis.

|v| = 10 and and is 60 degrees clockwise from the vector u.

- #5

Defennder

Homework Helper

- 2,591

- 5

60 degrees clockwise in which plane?

- #6

- 367

- 0

They are in the same plane.

- #7

- 12,121

- 160

I'm assuming u and v are in the plane of the page.

Find |u x v| and determine whether u x v is directed into the page or out of the page.

|u| = 5 and is directed in the direction of the z-axis.

|v| = 10 and and is 60 degrees clockwise from the vector u.

With your right hand, make a "backwards L", with the 4 fingers lined up together and your thumb pointing off to the side.

Point the 4 fingers in the direction of u (the first vector in the cross product).

Keeping those fingers pointing along u, rotate or twist your hand so that the palm faces clockwise (i.e., towards the direction of v, the 2nd vector in the product).

Your thumb is now pointing in the direction of u x v.

- #8

Defennder

Homework Helper

- 2,591

- 5

http://en.wikipedia.org/wiki/Image:Rechte-hand-regel.jpg

Let your thumb be 'u', your forefinger be 'v'. Your middle finger is now pointing in the direction of u x v.

- Last Post

- Replies
- 2

- Views
- 1K

- Last Post

- Replies
- 8

- Views
- 783

- Replies
- 1

- Views
- 3K

- Last Post

- Replies
- 5

- Views
- 952

- Last Post

- Replies
- 3

- Views
- 4K

- Last Post

- Replies
- 2

- Views
- 4K

- Last Post

- Replies
- 1

- Views
- 5K

- Replies
- 4

- Views
- 974

- Last Post

- Replies
- 1

- Views
- 785

- Replies
- 9

- Views
- 7K