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Physics Help Motion and Forces

  1. Feb 21, 2008 #1

    PROBLEM 1

    A 91 kg refrigerator is placed on a ramp. The refrigerator begins to slide when the ramp is raised to an angle of 34 degrees. What is the coefficient of static friction?


    PROBLEM 2
    A student moves a box of books down the hall by pulling on a rope attached to the box. The student pulls with a force of 185N at an angle of 25 degrees above the horizontal. The box has a mass of 35.0 kg, and coefficient between the box and the floor is 0.27. Find the acceleration of the box.

    I NEED GUIDANCE ON HOW TO SOLVE THESE PROBLEMS
    PLEASE INCLUDES STEPS SO THAT I CAN SEE EXACTLY HOW THE ANSWER WAS FOUND.

    THANX
     
  2. jcsd
  3. Feb 21, 2008 #2
    Well if we concentrate on problem 1:

    First of all draw a force diagram acting on the fridge.
    resolve the forces perpendicular and parallel to the fridge's motion.
    set up a force equation using f=ma.
     
  4. Feb 21, 2008 #3
    I don't think this forum hands out answers.
     
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