A 10 kg block slides from rest down a 5m long ramp. If the coefficient of friction between the block and the ramp is 0.4, what is the final velocity of the block when it reaches the botton of the ramp? I set this into two Fnet equations, x and y. I then solved for the acceleration in x which i got to be -3.92 m/s^2. However, I'm not getting the correct value for the final velocity. I'm getting 6.3 m/s, but it should be 3.9 m/s. Can you please tell me what I'm doing wrong?