# Math Help - physics question-kinetic friction

1. ## physics question-kinetic friction

A 26 kg box is being pushed across the floor by a constant force <103,0,0> N. The coefficient of kinetic friction for the floor and box is .18. At t=6 s the box is at location <10,4,-4>m, traveling with velocity <7,0,0>m/s. What is its position and velocity at t-7.6s?

I don't know where to start help please?

2. you write the equation of motion
the movement is 1-dimensional so you only need 1 equation

$x=x_0 + v_{x0} (t-t_0) + \frac{1}{2} a (t-t_0)²$

you got $x_0$, $v_{x0}$ and $t_0$ in the text
you find $a$ with Newton's 2nd law