What is the most destructive schoolmaster you have ever seen?

At school, a classmate came out of the classroom and was knocked down by a beautiful woman who ran over the wall, that is, with her arm, and then they flew half a meter. The beauty said sorry, and then left shyly. If you change to a boy with a little machine knowledge, you won't miss such a chance to hook up. The point is, the buddy got up calmly and measured the flight distance without looking at it, and said that he could calculate the girl's weight. Such a thing should have passed like this. After a while, everyone forgot about it. Until one day in physics class, the teacher talked about impulse formula and its application in real life, and the teacher began to ask questions. Physics was really a headache in high school, not to mention a charter that I had never studied before. Everyone basically avoided looking at the teacher, let alone raising their hands to answer. At this time, the goods actually raised their hands. Therefore, take the incident that the goods were knocked open by a girl a few days ago as an example. According to the impulse formula ft=mv, the impact force f = mv/t; M is mass, V is velocity, and T is impact time; With the conversion of time assumed above, m = 60kg, v = (29.88km/h), converted to 8.3m/s ... t, the impact time is 0.5s, the impact force F = 60 * 8.3/0.5 = 996 N is on the earth, and the gravity of 1 kg is equal to 9.8 Newton. Therefore, the weight of a 1 kg object is about 9.8 Newton. So the force converted into kilograms is 10 1 kg. Because the collision force of two people is mutual, and then divided by 2, we know that the girl's weight is 50 kg, so we know that the girl's weight is about 100 kg. All the data and formulas were said in one go, and the students in the class were feeling "unknown, but conscious" I don't know if he is really a bully, but obviously I admire his spirit of exploration.