Physics olympiad problem! ! ! Urgent!

Running has been soaked. This is a classic mathematical modeling problem. In this problem, we generally regard people as a cuboid and stay in rainy days at the same time. The rain that people are drenched consists of two parts. One part is drenched on the head, that is, the upper surface of the cuboid is wet; Part of it is the rain that falls on the face. We can calculate it. Let a person's upper surface area be S, his front area be S, the amount of rain falling on the unit area per unit time be K, and the amount of rain per unit space per unit time be L. The speed of people is V. Then, the amount of rain falling on people per unit time t is: V 1=st*k*t (as shown in the figure:

) In unit time, the rain that people face is: V2=vts*l*t (as shown in figure:

Therefore, in the case of the same rain properties, running and walking will encounter more rain head on, but the rain encountered above is the same. So running is much soaked.