Final answer:
A 350-pound man would have greater inertia than a 160-pound man, requiring more force to change his motion in a motorcycle accident and exerting a larger stopping force.
Step-by-step explanation:
How a man weighing 160 pounds compares to a man weighing 350 pounds in a motorcycle accident is primarily a question of inertia. Inertia is a property of matter that describes how resistant an object is to changes in its state of motion. It is directly proportional to an object's mass. Therefore, the man who is 350 pounds would have greater inertia than the man who is 160 pounds, meaning he would require more force to change his state of motion, such as slowing down or stopping during the accident. During an impact, a heavier person would exert a larger force on whatever is stopping them, such as the ground or a vehicle, due to their greater inertia.