PS.2.3 Window Washer Free Body Diagrams

MIT 8.01 Classical Mechanics, Fall 2016
View the complete course: ocw.mit.edu/8-0...
Instructor: Dr. Peter Dourmashkin
License: Creative Commons BY-NC-SA
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[@aishwarytiwari2534]

very confusing.. seriously very confusing ! why didn't he consider the equal tension by Beam on rope ? Also there has to be more content to explain Normal reaction force(like deep dive of friction). Professor did justice with subject . I was doing very smooth but totally stumped on this problem(or may be the way he soved !)

[@user-ck6ps6ok6x]

I didn't find explanation to the part e in the videos for the washer problem. The system “washer+platform” 5:42 will help to solve it. T_2p+F_1w-mg=ma, T_2p=m(a+g)-F_1w=2m(a+g)/3, since F_1w=m(a+g)/3 (answer to the part d).

[@aishwarytiwari2534]

Why this couple of normal forces doesnot occur if body is stable on ground ?

[@leoliu7492]

it does, but we choose not to show them for simplicity

[@saketkumar5167]

In considering the system do we treat two or more different objects as one object

[@666michele999]

What about the pulley B? Why hasn't he consider it?

[@antoniorubio602]

I think its because it is massless and it doesn't influence any other force on his diagrams

[@owen7185]

@@antoniorubio602 that's right

[@chowdhury_kamruzzaman]

Washer and washperson are different ?

[@guillermogini6879]

no they're not