rayray

So if someone uses the same three movements to hit a wall at exactly the same time, does the force just add up normally and not 'compound' or does the speed and timing of forces not matter at all?

Hi, first of all I'm new here and ready to learn! So I'm sorry if my questions seem stupid and please correct me if I'm wrong. My question is this: When multiple forces of different speeds that share the same mass act on a single point, how do you calculate the force applied? An example would be a martial artist going in for a punch, and there are three places where he exerts force, the extension of the arm, the jerk on his upper body and using his legs to propel him forward but only the fist connects to the person he is punching. My teacher told me to simply add the forces up and I'm skeptical of that. As F=ma, the mass remains but the speed of these forces are different. So is it possible that the 'sum' of these forces not add up as it should?