Insurance institute sez: heavier is safer
There was quite an argument going on about this on another thread, but as the title to this article shows: Physics rules: link F-350 is the safest vehicle on the road
Forum Discussion
Same in football. When a defensive tackle hits the offensive quarterback who is going to be on the bottom? Two objects can not occupy the same space at the same time. The object with the most mass will typically win. This is not accounting for man made built in safety features and devices.
