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Tow truck dragging Tractor

  • #1

Homework Statement


The coefficient of limiting static friction of a rubber tire in wet concrete is 0.70. What mass of tractor, with its brakes locked, can be dragged by a tow truck that can exert a horizontal force of 1.0 * 10^4 N?


Homework Equations


Fnetx = ma

Ff = us*Fn

Fn = m*g

The Attempt at a Solution


10000 / (0.70*9.8) = 1457.72


Is that right??..........Help NEEDED:confused:
 

Answers and Replies

  • #2
340
0
What you calculated is the maximum mass of a tractor that can be moved, starting from rest on a horizontal surface, by a tow truck. Because the coeff. of kinetic friction is less than that of static friction, a more massive tractor could be pulled if it started with a nonzero speed. NOTE: I am just nitpicking the question, your solution seems fine to me.
 
  • #3
oo so thaz rite??
 
  • #4
340
0
yes, good.
 

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