Me where do you find a half life plz 26 points if you me this hard question is on my science thing test

N(t)=final quality

N.=initial quality

N(t) n.(1/2) t/t 1/2

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