Cylinder Falling from Unwinding String

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SUMMARY

The discussion revolves around solving a physics homework problem involving a cylinder falling from an unwinding string. Participants emphasize the importance of demonstrating effort before seeking help, as per the forum's guidelines. Key steps recommended include creating a diagram to illustrate relevant variables and gathering equations that relate these variables. This structured approach is essential for effectively tackling the problem.

PREREQUISITES
  • Understanding of basic physics concepts, particularly dynamics.
  • Familiarity with free body diagrams and their applications.
  • Knowledge of kinematic equations and their derivations.
  • Ability to apply Newton's laws of motion in problem-solving.
NEXT STEPS
  • Research how to create effective free body diagrams for rotational motion.
  • Study the principles of energy conservation in falling objects.
  • Learn about the moment of inertia and its impact on rotational dynamics.
  • Explore the relationship between torque and angular acceleration in cylindrical objects.
USEFUL FOR

Students studying physics, educators seeking teaching strategies for problem-solving, and anyone interested in understanding the dynamics of falling objects and rotational motion.

milanocookie
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Homework Statement
Iron cylinder with radius r has a string wound around it. As cylinder falls it unwinds string. Write an equation that relates the forces that act on the cylinder to its linear accceleration a, along with an equation that relates the torques that act on the cylinder to its angular acceleration a.
Relevant Equations
Moment of inertia of a solid cylinder is I= ½mr²
I need help with this homework question and I'm blanking out. Can anyone help me to answer this question correctly.
 
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milanocookie said:
Can anyone help me to answer this question correctly.

Break it up in steps!

A good first step is to make a drawing that shows relevant variables

A natural second step is to collect relevant equations connecting these variables

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