Can you solve these physics riddles? ft Simone Giertz - Part 1/3

A spin motion induces a force vector along its axis in the same direction as given by the Right hand thumb rule.
Same thing would happen along the axis of the screw while pedaling.
This leads to a mild tightening effect for the Right pedal so RH screws are fine here
For the left hand side however the effect is an outward force along the screws axis directing the screw to fall off.
Using a RH screw here makes the gradual loosening and falling off easier.
LH screws don't negate the force generated along the axis. It just makes it difficult to loosen this screw.