which calculation should i use??@_@ 1. The problem statement, all variables and given/known data a 1.4 kg bottle of milk is lying horizontally in the rack. the two surfaces on which the bottle rest r 900 apart, and the right surface makes an angle of 450 with the respect to the ground. each surface exerts a force on the bottle that is perpedicular to the surface. determine the magnitude of each of these forces * the bottle is lying 90 degree vertically 2. Relevant equations f=ma? w=mg? or should i find the resultant force by using cos and sine 3. The attempt at a solution ive tried..but all the answer are different..