Static vs Dynamic: Finding Force of Tension

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SUMMARY

The discussion focuses on the differences between static and dynamic methods for calculating the force of tension in a string, illustrated through a lab experiment involving a toy pig. In the dynamic method, the radius of the pig's circular motion is measured to determine the angle and subsequently the tension force. Conversely, the static method employs a spring scale to measure the horizontal force exerted on the string when the pig is stationary. The distinction lies in the movement of the pig, with the dynamic method accounting for motion and the static method relying on equilibrium.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with the concept of tension in strings
  • Knowledge of using a spring scale for force measurement
  • Basic principles of circular motion
NEXT STEPS
  • Explore the principles of circular motion in physics
  • Learn about the applications of Newton's laws in dynamic systems
  • Investigate the use of spring scales in experimental physics
  • Study the differences between static and dynamic equilibrium
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Physics students, educators, and anyone interested in experimental mechanics and the principles of tension in strings.

ys2050
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What is the difference between figuring out the force of tension in the string using the static and the dynamic method??
We did a lab where a toy pig was hung from the ceiling with a string and when we turned the pig on the wings moved and traveled in a circle...

In the dynamic case, we just measured the radius to get the angle and find the force of tension.
In the static case, we used a spring scale, hooked it onto the hook where the pig is attached to the string, and pulled it horizontally to its radius. With the horizontal force we were able to find the force of tension in the string.

What are the differences between these two methods?? Why is one called static and the other, dynamic?
 
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ys2050 said:
What are the differences between these two methods??
It's not obvious to me why there should be any difference. Perhaps one method provides more of an opportunity for experimental error to creep in.
Why is one called static and the other, dynamic?
That's an easy one: In one case the pig is moving (dynamic), and in the other case it is not.

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