Desperate for help -- studying an angular motion problem

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SUMMARY

The discussion centers on a student's struggle with angular motion problems, specifically calculating the forces acting on a receiver when a slender rod rotates. The student, Drew, has attempted to calculate angular velocity (Omega) and angular acceleration (alpha) but is uncertain about the next steps. Drew's calculations indicate an angular velocity of 0.25 rad/s and an angular acceleration of 0.0042 rad/s². The conversation emphasizes the need for clarity on which formulas to apply next, particularly regarding the parallel axis theorem and moment of inertia (Ig).

PREREQUISITES
  • Understanding of angular motion concepts, including angular velocity and angular acceleration.
  • Familiarity with the parallel axis theorem in rotational dynamics.
  • Knowledge of moment of inertia calculations.
  • Basic proficiency in physics equations related to rotational motion.
NEXT STEPS
  • Study the application of the parallel axis theorem for calculating moment of inertia (Ig).
  • Learn how to derive and apply the equations of motion for rotational dynamics.
  • Research the relationship between torque, angular acceleration, and force in rotational systems.
  • Explore examples of angular motion problems to reinforce understanding of key concepts.
USEFUL FOR

This discussion is beneficial for students studying physics, particularly those struggling with dynamics and rotational motion concepts, as well as educators seeking to support learners in mastering these topics.

Hyburn
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hi folks, my back story is that I have failed my strength of materials and dynamics twice. the college I am attending put these courses in an accelerated time frame... this means 14 weeks of material turned into 7 weeks of material. I am not able to learn at that pace, hence why I failed twice.

I am not in these courses right now, but am trying to grasp the concepts so it doesn't happen again.

currently I am trying determine the force acting into a reciever when a slender rod with a mass of .033KG rotates 15degrees in 60 seconds and comes to a complete stop. the radius of rotation is .2542m

my calculations:
Omega=(theta)/t
=15/60
=.25 <<--------is this correct?

with this I can determine my angular acceleration:
(alpha)=dw/dt
=.25/60
=.0042 rad/s²

not sure what calculation to goto next. I have tried the parallel axis, I have tried the KE equation... not sure which path to take. this is where it gets REALLY FOGGY!

this is about as much as I picked up in class as the rest of this process is a complete blur... any help would be GREATLY appreciated.

-drew
 
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I want to master the process so please just advise me on what formula to use and which element I am solving for.

i.e.) use the parallel axis theorum to solve for Ig
 

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