I am in Oviedo and have been flying here for many years. Was away from the hobby for the last year and a half as I was recovering from cancer and it's treatment but am back flying again. Also a 107 and started flying RC in the mid-late 70's...
Your understanding of physics is as useless as Lazerbrain's, so I'll repeat my reply to him here for you.
Impact is a function of the relative speed of the two objects involved. And damage is a function of the ability of the impacted surfaces...