# Math Help - help w/ a algebra physics problem

1. ## help w/ a algebra physics problem

i cant find out what the correct formula is that i should be using for this problem:

crate has a mass of 27.3kg, its acceleration is 1.15 m/s^2 when it is pulled with a force of 92.6N, what is the coefficient of kinetic friction?

id appreciate any help.

2. You'll use Newton's 2nd Law. In this case:

$F-f_k=ma,$

where

$m=27.3 \, \text{kg},$

$F=92.6 \, \text{N},$

$a=1.15 \, \text{m/s}^2,$

$f_k=\mu_kmg=$ force of kinetic friction,

$g=9.80 \, \text{m/s}^2$.

Solve for $\mu_k$.