Kleppner and Kolenkow - Pulleys

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    Kleppner Pulleys
AI Thread Summary
The discussion centers on a physics problem involving two masses connected by strings and pulleys, where the goal is to find the acceleration of mass M1. Participants express uncertainty about the application of concepts related to massless and frictionless pulleys, particularly regarding net forces and tension in the strings. One user seeks guidance on the problem while another indicates they are also struggling with it. The conversation highlights the need for clarification on the reasoning behind the forces acting on the system. Overall, the thread emphasizes the complexities of analyzing pulley systems in physics.
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Homework Statement



Masses M1 and M2 are connected to a system of strings and pulleys as shown. The strings are massless and inextensible, and the pulleys are massless and frictionless. Find the acceleration of M1.

http://img844.imageshack.us/img844/3758/cimg0572.jpg

Homework Equations



N/A

The Attempt at a Solution



I've reasoned that since the pulley is massless, the net force acting on it must be zero (otherwise the acceleration would be infinitely large). I could then use the tensions in the strings to arrive at an answer for the acceleration of M1, but I'm not sure that my reasoning really applies here. Could someone please offer some guidance?
 
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This was falling towards the bottom of the page, so I just wanted to bump it before it actually fell off.
 
Hi, did you ever get a solution or an approach to this problem? I am also working on the same one right now and am stuck on it...
 
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
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