Saved me after being stuck on this problem for an hour. Thank you!

You deserve so many more views thankyou

This was a great lecture, I have a question though, do we actually solve "The Action" integral and use it to find other quantities?

How did you find d/dx of yy'/(1-y'^2)^(1/2)?

Thank you sir 😊 I am totally understand this theory

thanks ,please some refrences it was good explenation

Nice!

Chúc anh luôn sức khỏe và hát cho chúng em nghe nhé

Tuis is Newton's 2nd law that results from the E-L en only for conservative forces.

Hello. I love your video 👍🏼 One suggestion that would be helpful: please group your videos into playlists. It makes it easier to find information on the viewer side.

8

It is so fascinating how "nature wants to minize stuff" i really wish people figure out the reason behind that before i die

Thankyou

Thank you so much, you have no idea how many hours i've spent trying to understand this concept and with this video it finally clicked!

Great job Eric! I love watching this as an "OLD" Mechanical Engineering student who was only taught Newtonian mechanics. Fascinating!

Sound?

What about making some playlists?

Very lovely

So so so cute :-):-):-)

Who is this guy?

곧 이영상은 알고리즘에 당첨됩니다

Thanks a lot for all your job. Greetings from México.

Thank You Sir

19:30 You are using an extremely dirty trick to obtain \ddot\theta because \theta and \dot\theta are supposed to be independent variables so there is no derivative of \dot\theta wrt. \theta. I suggest using Dr. Walter Lewin approach to this problem in ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-hDSZ4Nf-REw.html

I’m really glad I’ve found you. I subscribe first.

clutch man thanks

Molly and I are currently watching. 10/10 content, we love lenses and would recommend to a friend :)

Our bodies are mostly made up of water, which has an extremely high specific heat. This allows us to not be burned by absorbing little heat as we sprint across.

The person is not being impaled by the nails because of the distribution of their weight. As the person is laying on multiple nails the nails do not puncture the person as they would if all the person's weight was on one nail.

The person laying on the bed of nails is not being punctured because the total weight of the person is spread out over a larger area than say if this person would just be standing on 1 nail. This allows each nail to exert a small force back onto the person. Therefore the pressure will be less as the denominator constant of area increases

The person's weight is spread out over a lot of nails. Each single nail pushes back onto the person with a smaller force allowing the person not be become impaled.

The person isn't impaled because their weight is spread out over multiple nails. Each nail exerts a small force on the person rather than one nail exerting a big force.

When a person lies on a bed of nails, the person's body weight is spread out over multiple nails. This means that the amount of force that the person's weight is applying to the bed is spread out, which in terms of pressure means that the body's force is the same while the area is larger, so the pressure is also less.

Since the force mg of your body is not all confined to one nail, and instead spread out across many nails, you are not impaled. The area over which the force of your weight is applied is spread out.

The person isn't impaled because for a given force the person exerts, as the area the force is exerted over gets larger, the pressure gets smaller due to a larger denominator in the equation.