I'm having terrible difficulty starting this problem, it's one of the chapter excercises in the book and it's revisited in the homework later on. I'm going to give different data, as I would like to actually solve this one myself, I just need a kick start... 1. The problem statement, all variables and given/known data We've got an object moving in a plane, no velocity is stated at all, just that it's moving. It's mass is 6.00 kg and it's coordinates are given by 2 equations, [tex]x = 4t^2 - 1[/tex] and [tex]y = 2t^3 + 6[/tex]. They are asking what the net force acting on this object is at time t = 5.00s. 2. Relevant equations I know somewhere in there I'm going to use kinematic equations. I started by trying to find [tex]\Delta X[/tex] and [tex]\Delta Y[/tex]... Thanks to anyone who can point me in the right direction!