What is the kind of friction that slows a falling object?
Many terms on the same principal (above answer). By definition, friction is a force that happens when two (or more) kind of objects touch each other while each moving in different direction than the other(s), or one is moving while the other(s) don’t. How big the force is depends on the speed of the object(s), the size of the surface, and the coefficient of the friction (put these variables in a formula). If it’s falling in the water, the friction force is between the object and the water. The layman term for this is ‘fluid friction’ If it’s falling through the air, the friction force is between the object and the air. The layman term for this is ‘air resistance’. If it’s falling from the air into the water, then you have to account two kind of friction force (assuming you want to work up a calculation for it), the ‘air resistance’ and the ‘fluid friction’. In theory, if it’s falling through a vacuum space, than there will be no friction at all. But in reality, there are NO vacuum spac