Atwood Machine: Is g = 9.8 m/s^2?

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SUMMARY

The Atwood machine experiment is designed to demonstrate gravitational acceleration, typically approximated as 9.8 m/s². However, practical factors such as the mass of the pulley and string can lead to a lower experimental value for 'g'. In this discussion, the calculated value of 'g' was found to be approximately 7.1 m/s², confirming that real-world conditions affect the theoretical expectations of gravitational acceleration.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with the Atwood machine setup
  • Basic knowledge of gravitational acceleration
  • Concept of experimental vs. theoretical physics
NEXT STEPS
  • Explore the effects of pulley and string mass on Atwood machine experiments
  • Investigate methods to minimize experimental errors in measuring 'g'
  • Learn about the principles of dynamics in mechanical systems
  • Study the impact of friction in pulley systems on acceleration measurements
USEFUL FOR

Physics students, educators, and anyone conducting experiments related to gravitational acceleration and mechanical systems will benefit from this discussion.

curiousgeorge99
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Homework Statement


Simple question I'm sure, but I want clarification if possible. If you do an experiment with the Atwood machine and you need to calculate 'g', should it be close to 9.8 m/s^2 ?

Homework Equations



No equations necessary, theoretical question. I would think the Atwood machine is trying to demonstrate that g is actually 9.8m/s^2 ?

The Attempt at a Solution

 
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In reality, the pulley and string have mass, so the experimental acceleration will be less than the theoretical acceleration of the system
 
My 'g' is calculated to be about 7.1 m/s^2, so its good to know it should be less than 9.8.
 

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