Q: Mighty Mike weighs 200 lbs and is running down the football field at 8 ft/s. Speedy Gonzales weighs only 100 lbs but runs 16 ft/s, while Ponderous Poncho weighs 400 lbs and runs only 4 ft/s. In the encounter who will be more effective in stopping Mike?
A: All three have the same momentum, so any pair colliding head on will result in a dead stop.
c) for Q1.
Breaking bones deals with the kinetic energy lost in the collision. The greater the KE before collision, the greater the damage.