You can determine the change of kinetic energy by calculating the work done on the system. That would be force multiplied with distance. However, you only have the distance for the given. Anyway, I've found a similar problem. So, I hope I could still help you in understanding it, even just the concept.
So, in the similar problem that I found, two opposite forces are acting on a block along the frictionless surface. F1 = +80 N and F2 = -30 N.
We get the net force. Then, we find the work which is just kinetic energy in form.
W = KE = F*d
KE = (80 - 30)*(4 - -6)
KE = 500 J
So, if you have the actual values and direction of forces, the same concept applies. I hope I was able to help.
Because he wanted a divorce and the church didn't allow it.
<span>The correct answer is A. Balboa, more precisely Vasco Nunez de Balboa. He was a famous explorer who managed to cross Panama and reach the Pacific ocean before anyone else, way back in 1513. He actually established a settlment which is the oldest European settlment in that region and is located in today's Panama.</span>