Answer:
it can be calculated by measuring the final distance away from a point, and then subtracting the initial distance 
 
        
             
        
        
        
Explanation:
Coefficient of kinetic friction is the resistive force that opposes the motion of a body as it moves and is in contact with another body. 
It is found by dividing the frictional force by the normal force. 
- Friction is a force that opposes motion. 
- Static friction is for bodies that are not in motion 
- Kinetic friction is for moving bodies. 
 
        
             
        
        
        
Answer:
0.000507 kg/m
Explanation:
L = Length of string
T = Tension
 = Mass density of string
 = Mass density of string
E denotes the E string
D denotes the D String
Frequency is given by

So


The mass density of the E string is 0.000507 kg/m