Mechanical Engineering: Particle Equilibrium (12 of 19) Pulleys and Mechanical Advantage

In this video I will calculate the forces and the tension of pulley systems.

Next video in the Particle Equilibrium series can be seen at:

[maxheuser]

The free body diagram is key to the analysis. And it vastly simplifies the calculation. Just learnt something new at age 70. Never too late

[alexanderson]

I watched a similar video on this subject by DrPhysicsA, and I ended up being confused - many thanks for clearing up my confusion with your clear explanation.

[edgelordrob]

These videos are really good I was feeling like there was something I was missing in regards to my education about pulleys and this is it. He really shows why pulleys work and not just how.

[prachikhandelwal]

you are awesome Sir I used to afraid from dealing questions on pulley system. but you clear my concept... thanks

[longlong]

Good theory. I remember the days at the end of junior school. That's cherished memory.thank you.

[ismailcetin]

I watch your videos from Turkey dear Michel Van Biezen from Istanbul Technical University and your teaching is very professional and clear. I want to say that you should consider adding a subtitle to your videos because the translation of YouTube algorith is not very clear and it may make a mistake and give us a wrong word. I encountered with lots of videos which was translated bad. Respect from Turkey.

[jryer]

Can a 2000 lbs weight dropping 2 ft, lift a 500 lbs weight 8 ft (ignoring friction)?

[jamesstockton]

That was the clearest explanation of pulliys I have seen.

[internetrules]

Pulley system 2 was a mindblow to me. I managed to predict 50 newtons on each end of the rope because you taught us that all the ropes have to have the same tension, and i predicted 50 newtons on the left rope attached to the ceiling, but had no idea what the weight on the right rope attached to the ceiling would be and was really surprised at 150 newtons total force.

I think the way it works is like: In pulley system 1, we have 100 newtons of force pulling down (the weight), and 100 newtons of force pulling up (50n from ceiling 50n from person pulling)

But in pulley system 2, there is 150 newtons of force pulling down, the weight (100n), and the person pulling (50n). half of the weight is going into the ceiling, which means the other half HAS to be going into the pulley, and the person pulling is ALSO putting 50 newtons into the pulley, so it has to be holding 100 newtons.

[rameshhariharan]

great. easy to understand by all. great explanation . thanks sairam sir

[Imustfly]

Not sure if you'll even see this, but here goes: In the 4th example, how can the amount of weight supported by the attachment point at the ceiling (133N) be more than the amount of weight being hauled (100N)??

[guloguloguy]

Thank you, very much, for this very practical lesson!!!

[yonatanshenhav]

a very clear explanation. thank you for making this video

[nancysmith]

Newtons are smart way for geniuses to understand. Simple lbs. Would be easier to understand which one would be better or easier to pick up most weight with minimum force numbers. 25 newton's...
Appreciate your time and upgrade of my IQ

[SineEyed]

Wait, so... arranging our pulleys a certain way has the consequence of imparting a net gain of force on the point of contact with the fixed plane? We effectively make the object to be displaced _heavier_ than it actually is? That's weird..

[shiwei-xt]

I can understand the first four questions, but why should the middle pulley be included in the analysis of the fifth question?

[arunbabu]

lots of doubts analysing the first diagram
1.how pulley is fixed
2. rope fixed ?
3.how load is being lifted
4.drawing free body diagram ..how different is it from previous first diagram n first diagram of this video where tentions get divided

[abelermiyas]

Why did you use the second pully in the free diagram on pully system 5 and didn't use the second pully on pully system 4?

[Happykat-lw]

Sir could you please explain us third and 4th diagram why is 33n multiply by 2 become 67 . Thanks heaps

[mostirreverent]

I understand that each side of a rope takes part of the weight but ultimately the ceiling mount should be the weight of the object divided by the mounting string in the pulling string???