Recent content by MichaelKD

That explanation makes so much sense, thank you!!

Oh okay, but why does the torque then change if you include the mass in the system or leave it out? Isn't the pulley rotating the same speed either way?

So when I'm solving a question like this should I assume they want the torque before it rotates at all?

My apologies, the first dash is just connoting a list. How did you get the correct answer with ma=mg-T?

Isn't T-mg=-ma equivalent to ma=mg-T (the equation I used)?

That's what I tried at first, but wouldn't that only work if the tension force is equal to the weight of the mass (mg). If that were true, the net force on the mass would be 0, meaning it's at rest. Let me know if I'm thinking about something wrong here.

Thank you! For the next part of the problem, it asks me to find the total angular momentum of the system, is that just the angular momentum of the pulley or do I need to factor in the hanging mass as well?

I started by summing the forces and torques to get: - ma = mg-T - I*alpha=Tr I then used a=alpha*r and I=Mr^2 to combine the equations and solved for angular acceleration equals 81.75rad/s^2. Plugging this back into a torque equation I got that the net torque is 1.04Nm. However, the problem...