Hey everyone,
I was playing tennis and was struck in the head with a tennis ball pretty hard. My opponent and I were at the net and the ball was lobbed and he volleyed it as hard as he could. Now, I am quite anxious, but I mainly want to know the speed of a tennis ball necessary to cause a concussion. It weights about .06 kg, but my kinetic physics is quite inapproximate, as I'm estimating too many values (like the speed of the tennis ball and the duration of contact with the head).
Any help is appreciated,
Tyler