1. If the boxer in Figure 6 is able to increase the duration of impact three times as long by riding with the punch, by how much will the force of impact be reduced?
2. If the boxer instead moves into the punch to decrease the duration of impact by half, by how much will the force of impact be increased?
3. A boxer being hit with a punch contrives to extend time for best results, whereas a karate expert delivers a force in a short time for best results. Isn’t there a contradiction here?
1. The force of impact will be only a third of what it would have been if he hadn’t pulled back.
2. The force of impact will be two times greater than it would have been if he had held his head still. Impacts of this kind account for many knockouts.
3. There is no contradiction because the best results for each are quite different. The best result for the boxer is reduced force, accomplished by maximizing time, and the best result for the karate expert is increased force delivered in minimum time.