Wolverine has claws to cut anything, but if I had a knife, even one made out of adamantium, and tried to hold it against a car coming towards me, or a moving airplane, my arm wouldn't be strong enough to cut, and would instead be pushed back.
See the 3rd law of Newton:
http://en.wikipedia.org/wiki/Newton%27s_laws_of_motion3rd law of Newton.
How does Wolverine manage to slice through such large, heavy objects without getting knocked back by the momentum?