Hi all, I'm new here and new to physics all together. I am taking a general science class in college (real basic stuff) and have only been focusing on physics for 1 term so im pretty ignorant on the topic. We have an in class assessment dealing with cars and their safety features: seatbelts(including inertia reels), airbags, crumplezones and brakes; dealing with the science behind their function. I need to refer to Newton’s Laws of motion, The Equations of Motion, energy transfers and momentum where appropriate. I am aware that the science in car crashes is all about reducing the stopping time, both of the car and occupant and that safety features need to take the occupants kinetic energy (or momentum??) and dissipate it over time to reduce injury. Other than the conservation of energy and Newton's first law, what other equations theories should i relate to these safety features and their function? Any input or just a general push in the right direction would be greatly appreciated. Thanks in advance, deman.