kinetic friction problem

theredlight

1. The problem statement, all variables and given/known data
A baseball player slides into third base with an initial speed of 7.90 m/s. If the coefficient of kinetic friction between the player and the ground is .41, how far does the player slide before coming to rest?


2. Relevant equations



3. The attempt at a solution

I have absolutely no idea how to solve this question.

FatCat0

I'll start it for you:

f(net) = ma

f(friction) = ma

mu(k)*g*m = ma

mu(k)*g = a

Then you can use these two formulas and you should be able to solve it:

a = (v(final)-v(initial))/t

d = 1/2*a*t^2 + v(initial)t


Just a hint: remember that g is negative.

Dick

The energy the player expends sliding is frictional force times distance. The initial energy of the player coming in is (1/2)*m*v^2. Equate them.