(btw, i think most people find it easier to use cos and sin, of angles < 90°, and then use common-sense to decide whether its + or -)
i don't understand what you did to find the moment …
can you please type it out in the post?
#5
LMW - Dk
4
0
Well can't you tell me how you would do this problem? how would you find the resultant and the moment?
#6
LMW - Dk
4
0
If you click on the second picture then you can see that i have drawn a direction vector. Then i have found the cfross product of the direction vector and the resultant force.
If you click on the second picture then you can see that i have drawn a direction vector. Then i have found the cfross product of the direction vector and the resultant force.
ah, now i understand …
no, you've crossed the resultant with the position vector for only one of the vectors: you need to cross each vector with its own position vector, and then add (ie, there's no short-cut)