Ok so I am having trouble calculating the speed of a box as it travels down a incline. I was Given 22 degree angle and the coefficient of friction (kinetic) is .22. Height of 9.10m (from rest at the top). I calculated acceleration while it travels down the slop and got 1.6721. I next need to calculate the speed when it reaches the bottom of the incline. I thought i would simply need to use 2*G*H ^(1/2) . It gives me 13.355 and it is wrong. Any help would be greatly appreciated or any equations i can use. Thanks from a new user. Paul.