Show the relationship between torque and angular momentum

[Shank]

<Moderator's note: Moved from a technical forum and thus no template.>

I am trying to design and perform a physics lab. It needs to show the relationship between torque and angular momentum. I have gotten as far designing a 4" PVC coupling and have it on a ramp. I am not sure where to go from here.

 

[fresh_42]

I am trying to design and perform a physics lab. It needs to show the relationship between torque and angular momentum. I have gotten as far designing a 4" PVC coupling and have it on a ramp. I am not sure where to go from here.

Is this a homework project? And could you give more details?

 

[Shank]

Yes it is. I have reworded it below:

I am trying to design and perform a physics lab. It needs to show the relationship between torque and angular momentum. I have gotten as far designing this: I have a 4" PVC coupling that rolls down a ramp.

I can figure out the moment of inertia with the mass and radius of the item. I can figure out how to get velocity by timing how long it takes to roll down the ramp. Then, the average angular velocity is the velocity divided by the radius. This multiplied by the moment of inertia gives me the angular momentum.

Now I need to relate that to torque. This means I need the angular acceleration to be multiplied by the moment of inertia. I am not sure how to get this. Also, I need to measure torque in a different way to compare the results. So I need the force applied to the pipe multiplied by the radius. The problem there is I am not sure how to calculate the force applied. Is is gravity divided by the angle of the incline?

 

[berkeman]

done

You're done adding more details, or you are done with your lab?