Conservation of Linear Momentum (Learn to solve any problem)

Learn about the conservation of momentum through animated examples, step by step.

Introduction(00:00)
The 30-Mg freight car A and 15-Mg freight car B...(00:52)
The 20-g bullet is traveling at 400 m/s when it becomes embedded...(02:56)
Block A has a mass of 5 kg and is placed on the smooth triangular block B...(06:14)

Learn about these topics before understanding conservation of momentum:

Book used: R. C. Hibbeler and K. B. Yap, Mechanics for engineers - dynamics. Singapore: Pearson Education, 2014.

[QuestionSolutions]

At 4:27, there is a typo. The acceleration should be negative in that step, since we picked up to be positive. However, the next step is correct and this does not affect the final answer.

[eksp.]

This deserves a million views. Thanks a lot, Sir!

[aidenbrown]

You are by far the best dynamics online instructor I've found! your videos are simple to understand and tackle some hard problems. PLEASE keep up the great work you're amazing!!

[joshuacharlery]

I finished Dynamics! This channel did help me!

[jadkhalil]

I am almost done my first year of engineering and would like to thank you for getting me through dynamics :D

[jaycivandehey]

This is my favorite channel to prepare for exams! Please do lots more example videos on work, conservation of energy, and impulse and momentum

[exotic]

The work that is done on these video is unreal, keep it up :)

[Tund_]

For question 2, if anyone finds it challenging to identify the integrals, I found that using the work-energy method is more intuitive. It avoids dealing with integrals and is simplified as:
1/2(Ma+Mb)(v)^2 - (N)(k)(s) = 0
and solve for s

[vn]

@4:27 when you calculate the normal force N, you said that upwards was positive so I think the equation would have been N(t) - 9.81(2.02)(t) = 0.

[Ankit-]

hey guys In 2:56 question, if you use work energy principle then it will be far more easier. T1+U=T2 (;T2=0) we have all value except the distance traveled, easy!
Also thanks to you I can pass my dynamic exam.

[thenellecornejo]

this is so clear and helpful, thank you!

[siddhirajput]

I never really comment but Damn! This is perfect, I was searching for this kinda channel, thankyou for clearing all our doubts! Loads of love ❤️❤️❤️❤️❤️

[BhrweBhrwe]

love to watch your videos thankyou for creating such a nice content for students that struggling in their studies hope to see more videos like these thankyou buddy again

[rk]

On the last problem at 7:25, I think it should be V a/b because we know from B's perspective A moved .5 meters. We don't know yet what b/a is. If we get it wrong in a case would it make a difference if we keep our signs correct? I can't figure that out. Thanks for your hard work.

[wilordsanmiguel]

thanks a lot for this video, GOD Bless

[alaukwuanozie]

Thanks so much for posting these!

A question about the second question. I used the equations of motion in y to find the Frictional force, then I used them again in x to find acceleration. Plugged it into the kinematic equation a ds = v dv, integrated and solved. I got the correct answer but I was wondering if it's another valid method or just a fluke. Thanks again!

[viralcat-wx]

3:43 We can also determine the distance using energy method right? Rather than determining the time (t).

[JyotiSingh-onml]

Very nice pedagogy and all concepts in a nutshell

[qusiaamer]

Bro, really you are so amazing thank you ❤

[sakn]

For the bullet block problem. wouldn't it be much easier to use work energy principle?