What could happen if a person doesn't get the proper amount of protein in his or her diet? The impact of a diet lacking in protein would be of little consequence.
Stored proteins would assist in creating new amino acids that the body needs.
The body would break down existing muscle to get the amino acids it needs.

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