In plants what type of tissue is responsible for transporting water and nutrients

It is called The Vascular Tissue.
One would say that it is the Xylem that is responsible for transporting water and Pholem for nutrients, but they both fall under Vascular system.
Hope that helps.

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