Collisions - Momentum - IB Physics

There are three types of collisions we deal with in physics: Elastic collisions (two objects bouncing off each other), inelastic collisions (two objects sticking together) and "explosions" (one object splitting into two). To predict the motion of objects after a collision, we use conservation of momentum: the total momentum of both objects before the collision is equal to the total momentum after the collision.

[@rabiaghafoor3561]

Thanks a lot for these videos. Your Explanatory Style is amazing it's pretty easy to comprehend. I really love your channel. Waiting for more videos

[@Ottotinne]

Thank you very much Andy!
These videos are wonderful and I like how a lot of example questions are used.
Keep up the amazing work.

[@SimpleStemIB]

Thank you so much Mr. Andy, I needed this

[@logarithmus.naturali]

I have part ones soon, thanks for this video Andy!

[@Salama7856]

I sow all the video' on momentum that extremely useful thank you.

[@linda-ruyun]

Thank you so much!! Is there any practice questions for collision with an angle please? Love your work as always.

[@valentinaxie9722]

really really really helpful !!!!!!

[@Anshnayan_15]

Thank you sir ❤️

[@giancarriedo715]

very helpful

[@lelandwang7596]

Hello Mr. Masley, I'm watching all of your videos to prepare for IBDP Physics HL, but I'm confused why the red ball before the collision at 15:30 has no momentum

[@lelandwang7596]

Never mind I got it

[@AndyMasley]

@@lelandwang7596 Yay! For anyone else wondering it has no momentum in the x-direction, but does in the y-direction

[@zucchins.17]

Hi Mr. Masley, I have a question regarding the y-components. How do you determine if it's negative or not? For example, the downwards y-velocity in the elastic collision 2-dimesional problem was regarded as negative 13:45, but in the inelastic collision problem, the downwards y component was positive.

[@AndyMasley]

It's arbitrary! What matters is that you keep the negative and positive directions consistent throughout the problem.

[@Judy-zf6dz]

@@AndyMasleyI came to ask the same question - I’m confused on the last one because I made the Y component a negative number so I got a negative velocity. Is that still fine?

[@AndyMasley]

@@Judy-zf6dzYup! A negative velocity just means a velocity in the direction you've arbitrarily set as negative.

[@user-rs9jw5jg6b]

what do i use in case of friction involved?

[@akashsrisai]

please marry me andy i love you