# Moment and cross product

1. Oct 12, 2011

### khutch2212

F = 5i + 3j Newtons acts 3 m to the right of the origin (x is horizontal and y is vertical). What moment does this force produce about the origin? Use the vector cross product.
"Great works are performed

2. Oct 12, 2011

### SteamKing

Staff Emeritus
OK, show us what you have tried.

3. Oct 12, 2011

### khutch2212

I really dont know where to start, b/c I dont understand how I am suppost to use the cross product with one vector.

4. Oct 12, 2011

### SteamKing

Staff Emeritus
Who says you have only one vector? Remember, a vector has magnitude and direction.

5. Oct 12, 2011

### Allenman

Does this help?

$\bar{M}_{o} = \bar{R}$ X $\bar{F}$