In chapter 1010 we saw zoro getting hit by kaid
Analyzing the aftermath, we know for a fact that Zoro was lifted up to some degree, but didnt change in position horizontally
On the other hand, we saw law being send flying by the attack.
Though there is a similarity between the two that both zoro and Law most probably took the attack on their stomaches
To make it clearer, let's see the visual here
We can see that there are two kind of sparks, the white one and the black one
Seeing by how Oda made the difference in size between the two, it's most likely that the white one is the real attack, while the black one is the CoC haki blast
Now, notice that the white spark didnt go through Law, Law was only hurt by the black spark. While as you can see, zoro was hurt by both the white spark and the black spark
This tells us that zoro took the attack fully
As stated earlier, you might argue why was Law sent flying while zoro not?
By real life physics, zoro shouldve thrown away if he took fully. To answer this question, it's simply that the physics governing one piece world isnt exactly the same as our real life physics
Here is a comparison
We can see that luffy too wasnt sent flying despite taking the attack fully. Moreover, both too were fixed in position before taking the attack. Zoro was lying on the ground, while luffy was mid air and got blitzed
Another point is that, unlike zoro, law had initial velocity before receiving the impact, which could possibly explain why he got sent flying while zoro didnt
