Studying for a level 1 physics test. Help with circular problem?

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SUMMARY

The discussion focuses on calculating the frequency of a stationary solid cylinder wheel with a radius of 0.3 m and mass of 1.75 kg after applying a torque of 12 Nm for 15 seconds. The moment of inertia (I) is calculated using the formula I = 1/2mr^2. Following this, the relationship between torque, moment of inertia, and angular acceleration is utilized to determine the angular velocity, which is then converted to frequency using the formula frequency = angular velocity / (2π).

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  • Understanding of moment of inertia (I) for solid cylinders
  • Knowledge of torque and its relationship with angular acceleration
  • Familiarity with angular velocity and its conversion to frequency
  • Basic physics concepts related to rotational motion
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  • Study the calculation of moment of inertia for different shapes
  • Learn about the relationship between torque, angular acceleration, and rotational dynamics
  • Explore the concept of angular velocity and its applications in physics
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Students preparing for physics exams, educators teaching rotational dynamics, and anyone interested in understanding the principles of torque and angular motion.

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A stationary wheel ?(solid cylinder) of radius .3m and mass of 1.75 kg has a 12 Nm torque applied to it. Determine the frequency of the wheel after 15 seconds.


I = 1/2mr^2

Am I supposed to find "I" first? What is the best way to go about this problem?
 
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Yes, find I, the moment of inertia of the cylinder. Then use the relation between torque, moment of inertia, and angular acceleration to get the angular acceleration. The angular velocity increases linearly with time under the effect of the constant torque. Find the value of the angular velocity 15 seconds after start. The angular velocity is 2pi times the frequency.

ehild
 
Thank you so much! I will let you know if I have anymore questions later on.
 

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