Physics Lesson: Momentum Part 2 High School College Tutorial

[SmartActs]

Do you realize that you saved me and my friends lives, we had 3 days for our physics exam and we understood nothing because our teacher is a douche bag.... WE THANK YOU A MILLION MILLION, i would give you each a bromance hug if i met you.

[seragreen]

How come you use grams? In our school we always use kg as the SI unit when solving momentum problems. :-/

[harino45]

What if the final velocity of both masses is 0 after collision?

[WeKilledYourTime]

Thanks, these videos are helping me get a head start, as I will be taking ap physics next year.

[nightreaper999]

you have awesome hair. and the physics lectures are good too :D

[MrAmaterasu96]

ok this seems great but if you are calculating the momentum of and object using the formula P= mv, will you then have to change the units to kilograms, because the units of momentum is kgm/s therefore it has to be changed not so, someone please correct me if i am wrong!?!?

[BikutaHo]

this is pretty much how i learn physics now, im in AP physics and my teacher never lectures so this youtube channel is my teacher :P Thanks for the videos and nice job on explaining, very detailed

[PhysicsEH]

@BikutaHo Glad we could help

[phobiaspasm]

Hey that's a great lesson, it really helped me remember what I learned last term, now at least I don't have to go back to school completely blank.

[PhysicsEH]

@phobiaspasm Thanks for the great comment. Glad we could help. Good for you reviewing before classes start.

[PhysicsEH]

@aoezyurt Thanks. We're glad to help.

[lincerna]

@PhysicsEH : do you have a video of elastic collisions wherein final velocity of two bodies is unknown? (confused)..Thanks =)

[PhysicsEH]

@lincerna Not yet but we may be making one on that at the end of November. Sorry if that is too late.

[lincerna]

@PhysicsEH its alright.we already finished the said topic anyway,,,now,we have electromagnetism.do u have any videos on that?

[PhysicsEH]

@lincerna Sorry, we don't have any on that topic yet. I hope the other videos were of some help.

[lincerna]

@PhysicsEH yes they were.thanks.

[SuCKeRPunCH187]

@PhysicsEH what is that sympbol written next to the velocites a and b on the right side of the equation, it looks like a quotaton mark kind of?

[mcaruana1]

@SuCKeRPunCH187 Hi. The symbol indicates that the velocity is after the collision so Va is the velocity of "a" before the collision and Va' is the velocity of "a" after the collision. Hope this clears it up. Thanks

[82THEKING07]

@lincerna The great teacher said that at least one of the final velocities in an elastic collison has to be given or else there is a problem. I had the same question at first until I watched it again.

[7JaMeSdAbEaSt15]

Where is the video for momentum and angles? :(

[PhysicsEH]

@7JaMeSdAbEaSt15 Great point. We'll have to make some. Thanks for the idea.

[lincerna]

dude..i think you should change the mass into kg ..because if you dont.youll get a different,not mentioning irrational ,speed,..

[PhysicsEH]

@lincerna Hi. Because the mass is in every term of the equation, the units for mass drop out. If you convert the mass to kg and calculate Vb you will find you get the same correct answer. This does not work for most equations because mass usually does not appear in every term. You can see this if you divide every mass by 1000 you will notice that you can cancel it out of each term. Sorry if that was not clear in the video. I hope this helps. Thanks for the question.