1. The problem statement, all variables and given/known data This is just for a formal engineering report, no product will be made. for my ME class, one of the very first courses. pre-requisite for this class is only vector static. This is the first week of class, and the lectures covered the role of engineers... I am being asked to design a small 4 wheels vehicle (can be transport on the bed of a pickup truck) which can be operate at human walking speed (~5mph), able to steer and brake, and have a reliable suspension system. This vehicle shall be able to climb a 40° slope, go over 12 in dia log, and go across a 30° incline. This vehicle will be used on hot ground (~120F) and used by [STRIKE]fighter [/STRIKE] fire fighter, should be able to transport equipment as well as an injure body. 2. Relevant equations This is all I have from static F = ma Ff = μN F = -kx 3. The attempt at a solution This seems overwhelmingly difficult consider the fact that I am being ask to make a complete car from scratch, including choosing the right material, choosing the right engine or motor. we have 3 ppl, so I was assigned to work with the suspension and brake. for going over the 12 in log, this has to do with the suspension system right? I will use the coil spring system. But how do I determine the diameter of the coil, the dia of the steel string, the number of loops, etc? For going over and across slopes, is it the same type of problem as moving a box up an incline? what is the essential thing for this to work? For the braking system, for this slow moving car, how do i determine the force that is needed to stop the tire? and what type of device that is usually used for making simple brake? Please help me with some pointers and or resource. All I have found from the internet are just explanation of the mechanism, not much calculation or the actual characteristic of these thing. Thanks for your time.