"A hockey puck on a frozen pond with an initial speed of 16.3 m/s stops after sliding a distance of 220.5 m. Calculate the average value of the coefficient of kinetic friction between the puck and ice."
-i thought i knew what to do, it seemed simple enough. i found the deceleration, speed divided by time (time=distance divided by speed). And then it should be deceleration divided by gravity?(f=uN) i get the wrong answer so obviously not. am i doing something wrong??