Physics 13.1 Moment of Inertia Application (6 of 11) Acceleration=? When Pulley Has Mass (mu=0)

In this video I will find the acceleration, a=?, of an object hanging from a pulley connected to an object on a frictionless table top.

Next video in this series can be seen at:

[ikennao]

first time I've heard someone speak in your class, I always taught you were alone !

[mikeyfazed]

Best physics teacher online, for real!

[mniayb]

Just wanted to let you know that your videos are REALLY helpful. Thanks lots

[elizabethnyangulu]

You are the best you talk about all the concepts in each topic ..I always run to watch your videos after learning 😩

[bonaparte]

these are everything i need from my lectures in physics, thank you so much

[theultimatereductionist]

In engineering courses, we carefully define a system around each component: the upper block, the pulley, the lower block, and do a force balance on each. We were properly drilled in defining systems in our chemical engineering courses (I was a chem eng major, not mechanical, but the same principles apply). Not saying you did anything wrong here, Professor Biezen, or that you had to do it the way I suggested for a problem of this simplicity (which is still pretty complex: I am sure I would have gotten the wrong answer had I attempted this on my own, since it has been a long time, since high school physics and one year of college physics).

[theoklisterzakis]

Thank you for your posting. It was really heplfull to understand ths moment of inertia

[saifalhosani]

Thank you bro you came in clutch for my finals

[TheRealKMM]

Great video, keep like that, but i want to know why at 2:45 mark, in τ= I α you make T2 positive and T2 negative ; my doubt is in torqs that counterclock wise is (+) and clockwise is (-)

great video :)

[robertvan]

I believe that the tensile force from T1 will have no effect on the net torque. Meaning net torque is =RT2.

[daibangx]

This lesson reminds me of years in high school. By the time, I really fell in love with physics, especially the part of Newton's laws, motion of solids, and laws of conservation of energy. It felt so good when I could use these laws to work out the acceleration or velocity and then imagine how all the blocks move.

[nickp]

Thank you for helping me help my little sis with her physics homework

[raghavendrav]

Thanks, Professor. Very clear explanation.

[TheCtenoMan]

You're a lifesaver, great video!

[TeamOverclocked]

Thank you so much. This was such a short but to the point video.

[albertbenjamin]

At 3:49 you write m2g - T2, I thought it would be reversed(T2-m2g) since force is a vector and mg is down, T is up.

[tridoan]

How do you know that T1 would cause torque to go in a counter-clockwise direction and that T2 would cause torque to go in a clockwise direction?

[noelvincephilipa.ibarra]

Two blocks with masses M1= 5 kg and M2= 15 kg are connected by a rope as shown. the horizontal surface has no friction and the pulley is weightless. If the block starts from rest, What is the speed of M2 if it has fallen 6 meters.

[sk.mahammadrafi]

hi Michel, your videos are great, do you have any videos explaining inertia and moment of inertia.
thanks in advance.

[ptyptypty]

for what it's worth... T2 > T1 .. T2 = (10/7)g T1 = (8/7)g and that is how the world works.. :D