Posted by Jessi on Sunday, September 13, 2009 at 3:42pm.
Each of the four wheels of the vehicle weighs 40 lb and is mounted on a 4in diameter journal. The total weight of the vehicle is 960 lb, including wheels, and is distributed equally on all four wheels. If a force P = 16 lb is required to keep the vehicle rolling at a constant low speed on a horizontal surface, calculate the coefficient of friction which exists in the wheel bearings.
The answer I calcualted was 10 and I know that can't be correct because the coefficients of friction are always less than 1

physics  bobpursley, Sunday, September 13, 2009 at 4:03pm
Your suppostion about being less than one is incorrect. What if the object being moved were superglued to the surface. IT can be greater than one.
NOw, the prob.
Each bearing has 960/4 lb force vetically on it.
each bearing is getting 4lb force to maintain movement.
forcefriction=normal*mu
mu= 4/230

physics  Jessi, Sunday, September 13, 2009 at 5:23pm
this still isn't the correct answer though. my book says that it's 0.204
Answer This Question
Related Questions
 Problem solving  I was watching the street, there were mopeds(2 wheels) bikes(2...
 Find the pattern problem solving  I was watching the street, there were mopeds...
 physics  A 2000kg automobile with fourwheel drive and weight distributed ...
 Physics  A 1000kg car has four 10kg wheels. What fraction of the total ...
 physics  A 1000 kg car has four 20 kg wheels. When the car is moving, what ...
 AP Physics  A 1050kg car has four 15kg wheels. When the car is moving, what ...
 physics  The mass of a vehicle is 4.25 tones concentrate 1.25 meters behind the...
 Word Problem  In last Saturdays parade Tom counted a total of 76 bicycles and ...
 physics  An automobile traveling 80 mi/hr has wheels 31 inches in diameter. If ...
 Math  A truck with 40in.diameter wheels is traveling at 50 mi/h. a) Find the ...
More Related Questions