31.7 Worked Example - Two Blocks and a Pulley Using Energy

MIT 8.01 Classical Mechanics, Fall 2016
View the complete course: ocw.mit.edu/8-01F16
Instructor: Dr. Peter Dourmashkin
License: Creative Commons BY-NC-SA
More information at ocw.mit.edu/terms
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[@HowViolet]

The greatest miracle here is how he’s writing backwards

[@liuhh02]

Awesome! Thank you very much for your clear explanation.

[@BoZhaoengineering]

your intepretation is very clear especially the energy change is zero and the potential energy change is negative work due to dot product. I love this math expression on this situation. Recall that I never got it done right in my high school.

[@PremiDhruv]

if friction is zero, why will the pulley rotate ?

[@nacicelik1954]

Hf must be on the ground or not?

[@mehdiezzine292]

no , you choose where you put your 0 value for problems like that , you just have to be consistent with it