Solve Physics Homework: Forces & Friction | Get Expert Help

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SUMMARY

This discussion focuses on solving physics homework problems related to forces and friction, specifically problems involving tension in strings and free body diagrams. For problem #7, participants are advised to draw the string attached to a hook, considering the symmetrical support of the picture's weight through vertical tension components. In problem #8, the discussion emphasizes creating free body diagrams for each mass, noting that the tension in the string remains uniform due to the massless pulley, allowing for simultaneous equations to solve for unknown tension and acceleration.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with free body diagrams
  • Knowledge of tension in strings and pulleys
  • Ability to solve simultaneous equations
NEXT STEPS
  • Study the principles of tension in physics, focusing on string and pulley systems
  • Learn how to construct and analyze free body diagrams in various scenarios
  • Explore Newton's second law and its application in solving motion problems
  • Practice solving simultaneous equations in the context of physics problems
USEFUL FOR

This discussion is beneficial for high school and college students studying physics, educators seeking to enhance their teaching methods, and anyone looking to improve their problem-solving skills in mechanics.

koralex90
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I am having trouble solving this for my physics homework. Please help with these two problems!

http://img151.imageshack.us/img151/5049/scan1wd3.jpg

I just don't know where to start... please guide me..
 
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For #7, draw the string attached to the hook using the angles given. Assume the picture hangs evenly and the strings are attached to the picture symmetrically so each end of the string supports the same weight (this is implied by the stated angles). The weight of the picture is supprted by the vertical components of the tensions. The horizontal components of the tension pull inward on the edges of the picture.

For #8 draw a free body diagram for each mass. Since the pulley has no mass, the tension in the string is uniform. Each mass will move the same distance with the same speed and the same magnitude of acceleration. You should be able to write two equations involving the unknown tension and the unknown acceleration, and solve them simultaneously for both variables.
 

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