Is it harder to crack a smaller screen or a larger screen? Why? For example, if I hit an iPhone with a hammer, would it break more or less than if I did the same to an iPad? Would it change which is more safe if I put a screen protector on? The force would be the same in both cases but it would be spread out more in the case of the iPad right? Or would the force spread out the same except the iPad might have less support near the center causing it to crack more easily?