Question: please help me check my answers to the following physics...
Please help me check my answers to the following physics problems. If they are incorrect, please explain the concept to me so I may correct my mistakes.
1. A 60 kg skate-boarder rolls down an inclined sidewalk
at a 370 angle to the horizontal. A constant frictional force of 55
N acts on the skate-boarder in opposition to the motion. What is
the skate-boarder's acceleration?
[I got a=4.98 m/s2]
I'm stuck on number 2. I got N=3.535 and a = -4.64, but I don't think they are correct