I am working on an SAE Baja vehicle for a competition as part of my coursework requirements. Right now I am trying to come up with a method to estimate the forces that the frame will be subjected to. I need help doing this. I know that the top speed will be 30mph and that the vehicle will weigh 500lbs. To calculate the force of an impact I would also need to know the impulse or time of impact. I'm kind of stumped on where to start.