How can I find the frictional torque in this moment of inertia lab?

Therefore, in summary, to find the frictional torque, the torque applied must be subtracted from the net external torque, which can be calculated using the given angular acceleration and moment of inertia.
  • #1
Erickimiscool
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Homework Statement


How much frictional torque is there? I know angular acceleration and torque applied. (I do not know if this can be used to find torque friction, though.)



Homework Equations





The Attempt at a Solution



I know that Frictional torque can be found by doing Torque net - Torque applied. But I do not have torque net, which is another part of the lab where I use the frictional torque found to find the torque net.
 
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  • #2
The net external torque of a rigid body is equal to the product of the angular acceleration and moment of inertia of that body.
 
  • #3
So, I cannot directly calculate the frictional torque in this case. However, I can use the given information of angular acceleration and torque applied to find the moment of inertia of the system. The moment of inertia is a measure of an object's resistance to rotational motion and is related to the object's mass and distribution of mass. Once the moment of inertia is determined, it can be used to calculate the torque net and then the frictional torque can be found using the equation mentioned above. Alternatively, if the angular acceleration and torque applied are constant, the equation T = Iα can be used, where T is the net torque, I is the moment of inertia, and α is the angular acceleration. By rearranging this equation, we can find the moment of inertia and then use it to calculate the frictional torque.
 

FAQ: How can I find the frictional torque in this moment of inertia lab?

1. What is the purpose of a Moment of Inertia Lab?

The purpose of a Moment of Inertia Lab is to investigate and measure an object's resistance to rotational motion, also known as its moment of inertia. This lab is often used to understand the concept of rotational inertia and its relationship to an object's mass and shape.

2. How is the moment of inertia measured in a lab?

The moment of inertia can be measured in a lab by using a variety of methods, such as the parallel axis theorem or by using a torsion pendulum. These methods involve measuring the object's mass, dimensions, and its response to rotational motion.

3. What factors affect the moment of inertia of an object?

The moment of inertia of an object is affected by its mass and its distribution of mass around its axis of rotation. Objects with a larger mass or mass located farther from the axis of rotation have a higher moment of inertia.

4. How is the concept of moment of inertia applied in real-world situations?

The concept of moment of inertia is applied in various real-world situations, such as designing structures like bridges and buildings to withstand rotational forces, predicting the behavior of spinning objects like gyroscopes, and understanding the motion of celestial bodies.

5. What are some common challenges faced when conducting a Moment of Inertia Lab?

Some common challenges faced when conducting a Moment of Inertia Lab include accurately measuring the dimensions and mass of the object, minimizing friction and air resistance, and ensuring the object is rotating at a constant speed. Additionally, interpreting and analyzing the data collected can also present challenges.

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