.. m of girl ~ kg vector sum of forces in this paul andersen explains how the vector sum of forces can be used to identify the net force on an object. the net force can be used to .The vector sum of two forces can be calculated by applying either the triangle law or the parallelogram law of vector addition. triangle law of vector addition the triangle law of vector addition states that if two vectors represent two sides of triangle in the same order, then the third side of the triangle represents the resultant sum of the two vectors, if taken in the opposite order . .. the vector sum of two forces can be calculated by applying either the triangle law or the parallelogram law of vector addition. triangle law of vector addition the triangle law of vector addition states that if two vectors represent two sides of triangle in the same order, then the third side of the triangle represents the resultant sum of the two vectors, if taken in the opposite order. The vector sum of three coplanar forces ) must be zero. ) must be perpendicular to one of the three. ) must be parallel to one of the three. ) must be perpendicular to the plane.

The forces acting on the nodes because of the springs is summation of the forces of each spring connected to this node. so for the indices in each row of ns (ns(,)>), take the sum fsn(,)=sum(fs(,ns(,indicess)),) with indicess=(ns(,)>), but have to loop this for =n ( times). the loop over all the nodes is the botteck of my code and use mspring systems because .