Calculating Torque Needed to Stop Flywheel

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    Flywheel Torque
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SUMMARY

The discussion centers on calculating the torque required to stop a flywheel with a given Moment of Inertia (I) and initial rotational speed (w1). It is established that the torque needed to decelerate the flywheel is identical at both ends of the gearbox, regardless of the gear ratio (1:100). This is due to the relationship defined by the equation torque = Iα, where α represents angular acceleration. Thus, the same torque value is applicable for stopping the flywheel at either end of the system.

PREREQUISITES
  • Understanding of Moment of Inertia (I)
  • Knowledge of angular acceleration (α)
  • Familiarity with torque calculations
  • Basic principles of gear ratios and their effects on rotational speed
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Mechanical engineers, physics students, and anyone involved in designing or analyzing rotating machinery and systems requiring torque calculations.

goelvaibhav
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Torque required!

Hi,

Problem Statement:

A flywheel with Moment of Inertia I, and rpm w1 is rotating. It has a shaft at is center which is attached to a gearbox (1:100) at one end. The output shaft of the gearbox will rotate at w1 x 100. The other end of the shaft of the flywheel will rotate at w1.

Now, I need to stop the flywheel in 't' sec. Will the torque required to stop the flywheel will be the same at both the ends?

Vaibhav
 
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Welcome to PF!

Hi Vaibhav! Welcome to PF! :smile:

(have an omega: ω :wink:)
goelvaibhav said:
Now, I need to stop the flywheel in 't' sec. Will the torque required to stop the flywheel will be the same at both the ends?

Yes, for a particular acceleration α, torque = Iα …

I is the same, so the torque will be the same whichever end you apply it. :smile:
 

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