# Homework Help: Solve for friction coefficient of block on sp

1. Sep 25, 2016

### tensor0910

1. The problem statement, all variables and given/known data

A block of mass 1.60 kg is connected to a spring of spring constant 152 N/m which is then set into oscillation on a surface with a small coefficient of kinetic friction. The mass is pulled back 34.6 cm to the right and released. On the first right to left oscillation, the mass reaches 33.22 cm to the left

What is the coefficient of friction?

2. Relevant equations

3. The attempt at a solution:

Pretty lost on this one. With 2 different distances, and a spring constant my first instinct was to use the total energy, and solve for V ( Fsp = 1/2k( xf - xi )

After that Im not sure....

2. Sep 25, 2016

### Staff: Mentor

Write out your Relevant equations for springs. Write out your relevant equations for friction and work.

Why do you suppose the spring's motion to the left is less than its initial stretch to the right? What changed? By how much?