Ok, I've done an experiment in which the coefficient of kinetic friction was measured by measuring the acceleration of an object moving down an incline. The mathematical relationship is: a=gsin(theta)-ukgcos(theta) The question is that I found a slight increase in uk as the incline angle increased. And I don't know how to explain this. I was thinking that since the net force and acceleration are directly related, an increase in net force will see an increase in kinetic friction, since friction acts due to the net force. Can anyone confirm or deny what I have said??