# Moment and cross product

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.
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SteamKing
Staff Emeritus
Homework Helper
OK, show us what you have tried.

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

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