7.3 Solving Pulley Systems

MIT 8.01 Classical Mechanics, Fall 2016
Instructor: Dr. Peter Dourmashkin

License: Creative Commons BY-NC-SA

[quynhanhle]

What about the force the pulley exerts on the rope? 🤔

[bobkameron]

This was a really helpful and enlightening video...

[virenderbhardwaj]

Why don't we show tension upwards on the rope as well....like as the rope is massless the tension is constant every Where along the rope....so these upward tension also don't cancel out?? Why don't we show it?

[serjerzemin]

But isn't that paradoxical when we assume the tension in the string to be uniform? The string shouldn't move at all according to the FBD of string or am I missing something?

[rakhigoel]

How is he writing that? Shouldn't it all be in reverse for us, like a mirror image to us.😱😨😮

[guitarsongs]

We said earlier that T1=T2 when ma =0 but here T1+T2= F pulley which means T1 is not equal to T2

[sharmilashrivastava]

why we choose different coordinate system not the same and how we can equation that are written for diffenrent coordinate system

[AvoidMissteps]

This is exactly how they should have taught it in undergrad. Back then, I was never fully convinced because my professors missed crucial aspects—like using different coordinate systems for 𝑚1 and 𝑚2, clearly stating assumptions, and most importantly, representing forces with proper subscripts (e.g., 𝐹 r, m for force by the rope on the mass). This video finally cleared up doubts I’ve carried for years.