How Does Tension Affect Motion in Atwood's Machine?

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SUMMARY

The discussion centers on analyzing the motion of an Atwood's Machine consisting of two masses: m_1 = 15.0 kg and m_2 = 28.0 kg. The participants calculated the weights of each mass, resulting in -147 N for m_1 and -274.4 N for m_2. The key questions addressed are the magnitude of the upward acceleration of the load of bricks and the tension in the rope during motion. It is established that the upward acceleration of the bricks equals the downward acceleration of the counterweight, and the difference in weights plays a crucial role in determining the tension in the rope.

PREREQUISITES
  • Understanding of Newton's Second Law (F=ma)
  • Basic knowledge of gravitational force calculations
  • Familiarity with Atwood's Machine dynamics
  • Concept of tension in a rope system
NEXT STEPS
  • Calculate the upward acceleration using the formula a = (m_2 - m_1)g / (m_1 + m_2)
  • Determine the tension in the rope using the formula T = m_1(g + a)
  • Explore variations of Atwood's Machine with different mass ratios
  • Investigate the effects of friction on the tension and acceleration in similar systems
USEFUL FOR

Physics students, educators, and anyone interested in classical mechanics, particularly those studying dynamics and forces in pulley systems.

Chandasouk
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Homework Statement




Atwood's Machine. A load of bricks with mass m_1 = 15.0 kg hangs from one end of a rope that passes over a small, frictionless pulley. A counterweight of mass m_2 = 28.0 kg is suspended from the other end of the rope, as shown in the figure. The system is released from rest.

yf_Figure_05_47.jpg



Homework Equations



F=ma


I really don't know what to do for this one. So far, I just calculated the weight of each masses.

Mass 1 Weight = -147N (15)(-9.8)

Mass 2 Weight = -274.4N (28)(-9.8)
 
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What's the question you are supposed to answer?
 
Sorry, I have a bad habit of not posting the questions now for some odd reason.

What is the magnitude of the upward acceleration of the load of bricks?
Take the free fall acceleration to be g = 9.80 m/s^2.

What is the tension in the rope while the load is moving?
Take the free fall acceleration to be g = 9.80 m/s^2.
 
The upward acceleration of the bricks will be the same as the downward acceleration of the counterweight. Seems to me that the difference between the two weights is important somehow.

For the tension in the rope, I would think the weights add.
 

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