What Are the Steps to Solve These Physics Problems on Motion and Forces?

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SUMMARY

This discussion focuses on solving physics problems related to motion and forces, specifically involving static friction and acceleration. For Problem 1, the coefficient of static friction for a 91 kg refrigerator sliding down a ramp at a 34-degree angle can be determined by analyzing the forces acting on the refrigerator. Problem 2 involves calculating the acceleration of a 35 kg box being pulled with a force of 185 N at a 25-degree angle, factoring in a coefficient of friction of 0.27. The discussion emphasizes the importance of drawing force diagrams and applying Newton's second law (F=ma) to derive solutions.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Knowledge of static friction and its coefficient
  • Ability to draw and interpret free-body diagrams
  • Familiarity with basic trigonometry for resolving forces
NEXT STEPS
  • Study the concept of static friction and its calculation methods
  • Learn how to draw and analyze free-body diagrams in physics
  • Explore Newton's second law and its applications in various scenarios
  • Practice solving problems involving inclined planes and forces
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Students studying physics, educators teaching motion and forces, and anyone looking to improve their problem-solving skills in mechanics.

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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
 
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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.
 
I don't think this forum hands out answers.
 

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