Presumably the destructive energy on impact will be proportional to the square of the velocity. Even at 20mph that's 4x the energy, 40mph is 16x the energy. Re

Presumably the destructive energy on impact will be proportional to the square of the velocity. Even at 20mph that's 4x the energy, 40mph is 16x the energy. Realistically I think it's because the way a phone gets damaged is highly dependent on: - Is it in a case - Which orientation did it land in - What surface did it land on