- #1

sunny17

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## Homework Statement

This is my first time posting here guys so correct me if I am wrong. This question was on my test and I wanted to know if I did it right. There is a block of mass m and it is moving at a certain velocity before pressing against a spring which compresses distance x.

Find Change in Kinetic Energy

Change in Potential Energy

Is this a conservative energy. Why?

Energy lost to Friction

Coefficent of Friction.

## Homework Equations

KE = 1/2mv^2

PE of Spring = 1/2kx^2

## The Attempt at a Solution

I don't know the exact measurements for the variables but I used the kinetic energy formula to find intial KE and the final should be 0 because it turns into Potential correct? I got negative for that.

I found change in potential by setting intial to 0 and using the equation.

I then noticed that kinetic and potential weren't equal and potential was smaller so there was no conservation of energy.

The loss in energy is friction? I then used this to find the coefficent. Is this correct?