I had a c section 6 weeks ago and im going to an amusement park can i ride roller coasters?

Roller Coasters has its risks regardless of your health status. Your current condition after surgery is unknown to anybody based on the information you have given; so unless there is more information I doubt anybody is able to vouch your safety if you choose to go on a roller coaster. I would suggest that you still choose your activities carefully and probably use abdominal support as you recover.