Answer to Question #192608 in Physics for Gurprashad Mann

Question

 A hockey puck has a mass of 0.170 kg; a soccer ball has a mass of 0.0425 kg; a baseball has a mass of 0.145 kg; and a tennis ball has a mass of 0.0575 kg. Suppose these objects were approaching your knee with the same velocity. Based on the most relavant quantity of motion, you would least likely need protection from the 

Answer 1

Based on the most relevant quantity of motion, I would least likely need protection from the lightest object, the soccer ball with a mass of 0.0425 kg. The most relevant quantity of motion is kinetic energy.