So, I've been thinking about Raziel thrusting his claws into cubes. He manages to thrust them into the cubes, which would suggest his claws must be incredibly hard. I've also been thinking about the intro to Legacy of Kain: Soul Reaver 2. I think that's the one. So we know that Raziel claws at Kain and this and the feat would seem to suggest Kain's durability is pretty high. (It's not actually the pressure of diamond formation (10 GPa) or a carbon nanotube (100 GPa) as I thought. I should read more carefully next time.) Well, it turns out my focus isn't on that, but on something else in physics called impulse.
I've taken careful consideration to watch as Raziel leaps at Kain. Kain pulls back, kind of like a boxer would if a punch was thrown his way. This is pretty good in terms of impulse because impulse is average force multiplied by time, so less time results in less force and more time results in more force. Observing the video, Raziel hardly has any time when he swings at Kain. It's actually pretty quick, at least in the millisecond range. Now, I don't know the acceleration at which Raziel swings, but I'll give it a try. First, I'll need to know the mass. It looks like Raziel's claws are at least two fingers in diameter. The average mass of an adult male's hand is anywhere between 300 to 400 grams.
I'm not worried about the diameter, but it will be worth considering. Let's go with 300 grams for the mass of a hand. Since Raziel has three claws, I'll take a third of the mass, which gives us 99.99 grams. Next, I need to see the swing of the attack to find the average velocity. The lowest time I ended up with was 128 milliseconds. The distance between Raziel's claw and Kain's face as he leaps appears to be about 68.58 cm. (2 ft. 3 in.) Dividing the distance by time, we end up with an average velocity of 5.3578125 m/s.
By trying to find the acceleration, which is final velocity minus initial velocity over time, using the same time it took for Raziel to swing and taking the average velocity would give us an acceleration of 41.85791015625 m/s^2, but I cannot help but wonder if this is incorrect because I would expect a lower number. Consider an object traveling at the speed of sound and say it takes 3 seconds for it to gain this speed, we'd end up with 114 m/s^2. Since the acceleration for Raziel's swing seems incorrect, I will simply work with 5.3578125 m/s^2, though it should be lower.
Using Raziel's claws, since he could very well be using three of his claws, I may as well just say he's using 300 grams anyway. Using F = ma, Raziel's swing would produce 1.60734375 kg m/s, or newtons. This is clearly smaller than the newtons produced using Brinell's hardness test, so what's going on here? Well, I'm not trying to find out how many newtons or pascals Raziel's claws might be producing when he thrusts his claws into cubes. What I'm looking for is impulse. As I said before, impulse is average force multiplied by time. This would mean when Raziel swung at Kain in the SR2 intro, taking 1.60734375 N and multiplying it by 0.128 s, we'd end up with a total of 0.20574 N s.
I do expect a reply, since this clearly goes against the notion you hold to, Kitten Lord. However, this would not contradict the feat Raziel performs early on in Soul Reaver, nor would it contradict why Kain was hardly affected by said claws. Impulse is an important factor here.
This short video can demonstrate it nicely.