I'm not sure you read my name: I took down both WTC towers with planes that were not heavy enough for so, and a side tower that was not even hit by anything...
A scissor that doesn't cut has nothing to do with force, it's about its sharpness... that's why brand new scissors cuts with all the blade long. The force has no effect in the case, only the sharpness... and as an structure engineer i can assure you that the force is the same in the bottom or on the tip, the difference is on the momentum.