# Physics coefficient of friction question

1. Jun 17, 2013

### Jasmin99

Physics coefficient of friction question!!!

A 17kg box is being pushed by a 150N force. If the box is accelerating at 2.3m/s2. What is the coefficient of friction on the ground?

FNet=μFn

Fn= 9.8x17= 166.6N
How can I find the fnet?

Last edited: Jun 17, 2013
2. Jun 17, 2013

### darkxponent

Hi Jasmin99. Welcome to PF.

You should read the how to ask for help forum. Will you specify where you are having problem?.

3. Jun 17, 2013

### Jasmin99

Sorry! I'm not sure how to find the Fnet.

4. Jun 17, 2013

### darkxponent

Okay. Can you draw the FBD of the object?

5. Jun 17, 2013

### Jasmin99

Here is my work:
Fnet= 150-(17)(2.3)
Fnet= 110.9N
Fnet=uFn
110.9=u166.6
U=0.66
Not sure if I did it right.

6. Jun 17, 2013

### 462chevelle

7. Jun 17, 2013

### barryj

8. Jun 17, 2013

### Jasmin99

Thanks for the help everyone! I have figured it out now.

9. Jun 17, 2013

### judas_priest

Yup, you've got it right. Make sure you post your attempt at the time of asking the question itself.