GCSE Physics - Momentum Part 2 of 2 - Changes in Momentum #60
ฝัง
- เผยแพร่เมื่อ 1 มิ.ย. 2024
- In this video we cover:
- How to calculate an object's momentum
- The concept that applying a force to an object changes its momentum
- How to calculate a change in momentum using the equation 'F=(mv-mu)/t'
- The idea that reducing the rate of momentum change results in a smaller force being applied to an object, and how this is applied in vehicle safety measures
Exam board specific info:
AQA - Separate science higher tier
IGCSE Edexcel - Separate science and higher tier only
Edexcel - Combined science but higher tier
OCR 21st Century - Combined science but higher tier
OCR Gateway - Separate science and higher tier only
GCSE Chemistry playlist:
• GCSE Chemistry - Atoms...
GCSE Biology Playlist:
• Video
GCSE Physics Playlist:
• Video
I literally cannot thank you enough youre the only chance i have at passing my igcses THANK YOU FROM THE BOTTOM OF MY HEART
Did you pass? How'd they go?
Heyyyy update us!!! What were ur results!?
@@itssadiaa hey guys! i passed with 5A*s and 2 As!!! can you believe i got an A* in physics? xD im so grateful! thanks for asking and thank you @cognito for being such a wonderful teacher, i got accepted into pharmacy in the top uni in my country and im in my second year :)
@@dropyourcroissant830 Great to heat that!! You absolutely rock! I'm so happy for you. I've got my IGCSe Examination in a few months. Wish me luck!!
@@dropyourcroissant830physics is so hard for me, pls pls tell me how u got A* in it
Since this is the last Cognito video I'll ever watch (I have my last two GCSEs tomorrow, physics and geography) I just wanted to say thank you for making such great videos. You've been so great since I made a note of the channel of a video my Year 9 chemistry teacher showed us over two years ago and I honestly don't think I'd be able to cram as well as I have been without these videos to watch. You explain everything so well without over-complicating it and I love the animations, especially the nerve cells in the biology videos. Thank you so much
how did it go?
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@@h8irai I was not saying that , people who write these comments oftenly don’t respond
Hi, sorry guys haven't been on this channel in almost a year, happened to be recommending these videos to Year 11s and felt like checking. Got my 9 and now almost finished AS-Level physics (not as scary as it sounds). Good luck to any current Year 11s! Remember, GCSEs aren't as bad as they feel, I hope you all get through it :)
This is an awesome seatbelt to pass physics exams, without getting crashed.
totally!
Yeah the way the infos presented doesn't crumple my brain
This video gave a helmet on my brain
@@mikamiko2576”you’re joookiiiingg”- Raquel 😭😂
for yall
00:05 Forces can change an object's momentum
00:52 Force required for change in momentum
01:37 Calculating force using change in momentum and time
02:20 Calculating force required to accelerate an object using momentum equation.
03:12 Calculation of final momentum and force using equation
04:05 A sudden decrease in momentum can cause severe injuries
04:48 Safety features in car design
05:30 Objects lose momentum more slowly because they're compressible.
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Thanks for the support!
hellooo cognito!!
honestly just want to thank you guys yet AGAIN for being such a help in my gcse path right now.
been watching (and commenting) since year 9 mock exams and this time im revising for my actual gcses!! aiming for all 9s in my actual exams fingers crossed!!
have to thank both of you for putting all of this together you’ve helped me so much, im forever grateful!!
I have my olevel gcse exams from the 25 of April too I hope yours go well too also how many are u giving
@@mahrukhnasir1298 bro same mine as well how is your preparation
No idea how to thank you other than saying thanks, because this has saved me. I've been doing online lessons for a while but the explanations I find sometimes are absolutely horrid, but not this. I actually was able to sit through it.
This guy! still replying to comments on a 3 year old video wishing them luck, What a legend!
got my paper 1 tmrw, aiming for a 9. Ive been using your videos to revise all my sciences, they are amazing thanks so much
Best of luck!
how was it
How was it JIMMY!!
This is one of the easiest and most simple tutorials I’ve watched, really helped me with my homework, thanks a lot 😁
seriously thank you so much for making these videos i literally love you bro.
U don't even know how many people your helping with these videos. Thank you so much
Cannot thank you enough! Keep on posting such videos pls
man your a life saver thanks alot i cant show u how much i appreciate u
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I Subscribed !
Thanks Sai, hope your exam goes well 🤞
thank u for ur time and effort u have really helped me and others
This is indeed a life saver i cant thank youuu your effort is amazing and plus i just subscribed
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Thank uuu . Really appreciate the hard work!!
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You are a life saver ✨ time to cram before tomorrow 🥰
You're videos are amazing!!!! Thank you so much for helping me understand these topics :)
Glad you like them! 😊
i owe you a big thanks
Finally someone educated thank you
If you’d like to practise what's covered in this video, check out the lesson on the Cognito platform - cognitoedu.org/coursesubtopic/p2-gcse-aqa-h-t_3.12. The platform’s totally free, and has been built to make learning and revision as easy as possible. The main features are:
- Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown.
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- A huge number of fully-hinted questions that take you step-by-step through some of the trickiest calculations & concepts.
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Amadeus & Tom
Hi, thank you very much for these videos. It helped me a lot. I know you're uploading GCSE maths videos right now but after you're finished can you start A-level physics et cetera?
Hi Mai_Ya, glad you're enjoying them, we can't promise anything but we are hoping to start A-Level science after these maths videos 👍
This is so good I literally got 98 percent on sessionals of physics
Well done Iffat, that's great!
THANK U FOR THE GREAT VID FOR PHYSICS LOVE YOU
Do I need to know how to calculate the change in momentum for the AQA combined science syllabus?
Thank you! You helped me a lot btw I just subscribed!!
Always good to hear - thank you! 🙌
how do you know to use this formula. we could have used F = m times a
The best physics channel ever you helped me alot🤍
can i get a reply?????????????????
thank u so much your video's are very clear and easy to undersatnd helping me for igcses
Glad to hear you think so 😊
Thank you so much
I had a question if we stop a cycle or any moving object what will be the formula? Will it be mv-mu/t.? In our textbook formula for this case is mu- mv/ t. As the final velocity is 0.
just THANK YOU
Thank you!
Mans a lifesaver
will I get a high grade in gcse if these videos is the only thing I revise from?
Hi Q, that’s a very good question, and the answer is both yes and no. ‘Yes’ because if you remember and *understand* all the information in these videos, you’ll be able to apply the knowledge and work out the answers to the toughest exam questions (and obviously answer the simpler ones). ‘No’ because we don’t cover practicals at the moment, and you’ll need to score highly in those to get a top grade, and also because the hardest exam questions will ask you to generalise principles you’ve learnt to completely new situations. We do our best to help show you how to think through difficult questions, but ultimately, it depends on the individual whether they draw the right connections between different concepts on the day, to get those top marks :)
Good luck with all your work 🙌
Q _TheFun practicing past papers helps tons !!
Cognito Thanks for the explanation, i’ve been wondering about this for a while
thanks for the help
I really liked your vedio it was so beneficial and satistifying.
Isnt ρ, rho used for density and small letter p used to represent momentum?
Cognito how many videos of physics are left and will you be doing the triple science chapters next
Hi Muhammad - yep we’ll be doing the triple stuff! I can’t remember exactly off the top of my head but there’s about 20 left :))
@@Cognitoedu thnx
@Cognito thanks
Tysm!, It helped alot
Great to hear it helped 👍
Hi, i have a question... in the first example the mass is not considered when calculating the net force...was that a mistake or am i missing something?
i think im pretty late but heres what i think. the formula he is using requires momentum, but not mass. we do need to know the mass to find the momentum tho, so if you already know the momentum then you dont need to know the mass but if you dont know the momentum then you do need it
@@aboodtube3969 *im pretty late*
excellent
Derivation of the formula Of force
F=ma
As a = (v-u/t)
F= m(v-u)/t
M(v-u) is change in momentum
Isn't F=(mv-mu)/t the same as the v-u/t equation?
no because the second equation is to do with acceleration rather than change in momentum
momentum has mass involved as well
@@neldino1251ah, thanks.
for the change in momentum question, cant you work out the change in velocity over time(acceleration)and the use F=ma to find the force applied??
That formula is derived from that one
So yes it can be used
So yes it can be used
this is great and all but i just realised how many huns I fumbled. it’s bad😅
4:30
Walrus
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Lol my school has IGCSE system and I'm preparing for a test
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No one care walrus????
Exam should cancel