# Coefficient of Friction

1. ### wind522

5
Question:
A baseball player slides into third base with an initial speed of 8.35 m/s. If the coefficient of kinetic friction between the player and the ground is 0.36, how far does the player slide before coming to rest?

How would I start this problem?? I would use Ff=uFn but it doesn't even give the weight of the player..
And would I have to use one of the kinematics problems to find the distance? If so, how would I find acceleration or final velocity?

2. ### Hootenanny

9,679
Staff Emeritus
Perhaps you don't need the mass, try using Newton's second law and see what happens . And yes, kinematic equations (after using Newton's second law) sounds like a good idea.

3. ### HallsofIvy

40,538
Staff Emeritus
In other words, just write "mg" for the weight of the player and hope the "m" cancels out!

4. ### wind522

5
How could I use Newton's second law of motion without knowing what any of the variables stand for?

5. ### Hootenanny

9,679
Staff Emeritus
I'm sure you do know what the variables stand for. Start by writing out Newton's second law and filling in any information that you know.

6. ### wind522

5
I got it! Thank you guys so much for helping!!

7. ### Hootenanny

9,679
Staff Emeritus
No problem, we didn't really do much anyway!