1. The problem statement, all variables and given/known data A motorcycle and 67.0 kg rider accelerate at 3.2 m/s2 up a ramp inclined 10° above the horizontal. What is the magnitude of the force on the rider from the motorcycle? 2. Relevant equations I set my 90 degree axis so that my x axis lined up with the acceleration up the ramp and my y axis lined up with the normal force. So my y component would be normal force-mass*gravity*cos 10° = mass*acceleration y 3. The attempt at a solution I am thinking that the normal force is the force on the rider from the bike and with the way my axis is set up there will be no y acceleration so, normal force= mass*gravity*cos10° it gives and answer of 646.62 N but they say this answer is wrong. Am I missing something or misinterpreting?