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Frictional Forces 
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#1
Nov1212, 04:24 PM

P: 6

1. The problem statement, all variables and given/known data
A baseball player slides into third base with an initial speed of 7.9 m/s. If the coefficient of kinetic friction the player and the ground id .41, how far does the player slide before coming to rest 2. Relevant equations vf^2=vi^2 + 2ad kf=μm 3. The attempt at a solution I tried subsituting but I need acceleration and distance. I didn't know where to go from there 


#2
Nov1212, 04:41 PM

P: 52

Are you given mass of the baseball player?



#3
Nov1212, 04:43 PM

P: 6

but why is the normal force equal to gravity and what is F_{UN} 


#4
Nov1212, 04:45 PM

P: 52

Frictional Forces
Sorry, do you have mass?



#5
Nov1212, 04:50 PM

P: 6

No, no mass is given



#6
Nov1212, 04:52 PM

Mentor
P: 41,489

Just call the mass 'm'. You won't need an actual value. 


#7
Nov1212, 05:01 PM

P: 6




#8
Nov1212, 05:37 PM

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P: 26,148

Hi Confused too! Welcome to PF!
so if the mass is m, what is the friction force?(btw, you can then use the work energy theorem) 


#9
Nov1212, 05:56 PM

P: 6




#10
Nov1212, 10:06 PM

Homework
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P: 9,876




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