Coefficient of kinetic friction I have a mojor physics test thursday (two days) and here is a pretest question that I cannot figure out if any one can figure it out I'd greatly appreciate it. I actually know what the answer is uk=0.253 I just dont know how to get that answer. " An apple crate with a weight of 49 N accelerates at a rate of 0.5 m/s2 along a horizontal surface as the crate is pulled with a force of 14.5 N as shown in Figure 1. The angle at which the crate is being pulled is 19 degrees. Find the coefficient of kinetic friction between the crate and the surface." heres my attempt: N=49+Fsin19 y direction Fcos19-uk=(5)(0.5) x direction I then tried to combine the two equations to figure out N and F but Im stuck.