Why does the amount of solute matter for osmosis?

The concentration of the solute in the solution affects osmosis especially in the value of the osmotic pressure since they are directly related. An increase in concentration will also result to an increase in the osmotic pressure and vice versa. It is the minimum pressure which needs to be applied to a solution to prevent the inward flow of water across a semipermeable membrane.

It depends on the surface of the levels. the rougher the surface, the greater is the frictional force. for rougher surfaces, you would need to exert greater force to move the object. the concept is that, you must overcome the frictional force in order to bring the object into motion. this is the reason why we add lubricants to the joints so they could easily move. this answer was on