Newton’s Second Law of Motion - Force and Laws of Motion | Class 9 Physics
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✅ In this video,
✔️ Class: 9
✔️ Subject: Physics
✔️ Chapter: Force and Laws of Motion
✔️ Topic Name: Newton’s Second Law of Motion
===============================================
00:00 Introduction: Force and Laws of Motion
00:04 Newton’s Second Law of Motion
25:20 Website Overview
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Newton’s Second Law of Motion
Change in momentum can be calculated as:
Case 1: P = Pf - Pi
= mv - mu
= 2(5) - 2(0)
P = 10 kg m/s
Case 2: P = Pf - Pi
= mv - mu
= 2(10) - 2 (0)
= 20 kg m/s
Hence proved
Force ∝ Change in momentum
More the force more will be change in momentum.
Force ∝ 1/t
Where, t = time at which momentum velocity changes
Comparing both the concepts
Force ∝ p/t
Force ∝ (mv -mu)/t
Force ∝ m(v -u)/t
Force ∝ ma
Force = Kma (k = proportionality constant i.e. value of k in SI unit is 1)
Force = mass x acceleration .
Disclaimer: "This video is for educational and informational purposes only and is not intended to infringe on any copyrights. If you believe that this video has used any copyrighted material in a way that constitutes copyright infringement, please contact us at contact@magnetbrains.com and we will take appropriate action."
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Previous Video: Momentum - Force and Laws of Motion kzfaq.info/get/bejne/qKeDecipt9rLnYE.html Next Video: Numericals - Force and Laws of Motion kzfaq.info/get/bejne/eNNmgqVe1Ja0oqc.html
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Ma'am but change in p in i case of glass will be -10 as m(0-10) but you have written 10
@twistofcolours5107 3 жыл бұрын
We should subtract final velocity-initial velocity and not initial velocity-final velocity, v=10, u=0 tha thats why she did so
@TarushiSah 3 жыл бұрын
@@twistofcolours5107 but she has taken final velocity =0 11:05
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11:14 Mam change in momentum will be,0-10=-10kg m/s
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@unknown-vf7rm 3 жыл бұрын
In the first example of glass breaking in floor change in momentum would be (-10 kg.m/s)
@MagnetBrainsEducation 3 жыл бұрын
Sunita Singh, Thank you for your comment. Do recommend Magnet Brains to your friends.
@silviasoren7544 3 жыл бұрын
Yess that was supposed to be (-10 kg.m/s)
@rajkishorikhare4197 3 жыл бұрын
Momentum can't be negative so she removed the sign
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@@rajkishorikhare4197 why can't it be negative there's no such fact..!?
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Aap plz final velocity or initial velocity ko v and u lijiya
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@hetanshishirokha6805 3 жыл бұрын
Why we took 5m/s as our final velocity I think we should take it zero because the glass stopped at a point and stop means it's velocity finally became zero. [( At 12:36)]
@Devil_boy_prakhars 3 жыл бұрын
Initial velocity mention nahi hai it mean chalne ke pehle vo ball rest per the agr koi bhi object ruka hua hai fir vo chalna start karta hai it means uski Jo initial velocity Hogi it becomes 0 .I hope it will help u .if u like then please reply me
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@archanamarwaha6548 2 жыл бұрын
In the first example of glass breaking in floor change in momentum would be -10 kg.m/s
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@snehlatachauhan562 10 ай бұрын
Mam free fall ke case me ir jab upar kuch throw karege to dono case me final velocity hi zero hogi ya in case of free fall initial velocity zero hogi
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@vijayshanthi583 3 жыл бұрын
11:12 it is -10m/s mam because it is 0 - 10 not 10 - 0
@shalinisingh1136 3 жыл бұрын
Yess......... Then the momentum of the glass falling on the floor will be lesser than the other example.... This is making me confused
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@@shalinisingh1136 ya me also
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@iclempire1190 3 жыл бұрын
Mam I have a confusion 🤔 at 13.10 you have written that in first problem momentum is 10m/s but when you are solving the first problem m(0-10)kg = -10kgms^-1 here -10 comes and you have written +10
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@silviasoren7544 3 жыл бұрын
Yess that was supposed to be (-10 kg.m/s)
@phoolkumari232 3 жыл бұрын
I have also the same confusion🤔
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Jaise velocity kabhi - me nahi aasakti waise. Hi momentum bhi
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@serrybera24 9 ай бұрын
the rate of change of momentum directly proportional to the force applied on it and takes place in the direction in which the force applied on it
@SanjayYadav-mp6yq 4 жыл бұрын
Mam glass wale case m first glass ki change in momentum to -10 kgm/sec hogi n Aapne -10 nhi 10 likha h
@SanjayYadav-mp6yq 4 жыл бұрын
Anyone plz clear my doubt
@NITISHKUMAR-vb9zb 4 жыл бұрын
Hh..-10 kgm/s hoga.. kyoki initial velocity 10 m/s h... aur final velocity 0 h...so -10 kgm/s hoga..may be mam se mistake ho gya h
@SanjayYadav-mp6yq 4 жыл бұрын
Thank u 😊
@jyotidwivedi1175 3 жыл бұрын
Negative sign show that the direction of momentum is opposite......clear☺️👍
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@@NITISHKUMAR-vb9zb haan i was thinking the same thing thanks bro/sis!
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I just love your video and understand it very easily and I had tell to my friends to watch it and I get many positive and effective comment you are the best science teacher
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Shivaji Jadhav, Thanks a lot for watching the Magnet Brains videos. Please recommend us among your friends.
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@@MagnetBrainsEducation yess🥰
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Thank you very much maam you cleared all my confusion. Thank you once again ☺
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Rohan, Thanks a lot for checking out the video and replying back. Do recommend Magnet Brains to your friends. Also do checkout the Magnet Brains website, all video lectures are organized on the site for easy access.
@Gagan6979 3 жыл бұрын
@@MagnetBrainsEducation ...ok. 🖤 I 'll..
@labhanshivivaan3236 3 жыл бұрын
Very Nicely Explained Mam But I have a doubt that:- In that glass example why you didn't include the surface on which the object is falling i.e., (the cushion and the road)? Surface plays a major role in breaking of that glass....
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Ghnta🥴👎
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@abcdxyz9080 Жыл бұрын
Mam can you please tell .. if we provide more force to same mass then three things will change * Change in Momentum will increase with increase in force * Distance travelled will increase * Velocity will increase Is it right
@abcdxyz9080 Жыл бұрын
Mam please reply
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Best concept 🔥🔥🎉🎉🙏🙏👍👍
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18:52 vi 😂 it's Vodafone+idea hihihihihihihihihihihihi
@nainuarts2630 2 жыл бұрын
Thanku so much ma'am for this great explaining and helping me for my exam preparation.
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Hi
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@@moderntechnology5159 yes
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easy for understanding...no tution needed
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I understand every thing that you taught
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Hi
@gauravkhimnani3454 3 жыл бұрын
mam, if we throw ball from upper direction which lands to the ground at that time what will be my initial velocity ? and if I throw ball from ground to upper direction so what will be my initial velocity
@adrh3374 3 жыл бұрын
0
@aradhyatiwari1620 3 жыл бұрын
0
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@MagnetBrainsEducation 3 жыл бұрын
Shreya Bharadwaj, Thank you for your comment. Do recommend Magnet Brains to your friends.
@anitapandey5200 3 жыл бұрын
Mam u are so sweet and intelligent .......it was the only topic on which i was confussed but u helped me a lot i only want to study by u only mam
@MagnetBrainsEducation 3 жыл бұрын
Mercy queen123, Thanks a lot for checking out the video and replying back. Do recommend Magnet Brains to your friends. Also do checkout the Magnet Brains website, all video lectures are organized on the site for easy access.
@bluheartyt6486 3 жыл бұрын
Mam, Only one think i didn't understand from the beginning of the motion chapter ,upto this video is . In which question we will use which formula ? Truly i don't understand
@MagnetBrainsEducation 3 жыл бұрын
Blu Heart YT, Thank you for your comment. Do recommend Magnet Brains to your friends.
@yoursdoyie 2 жыл бұрын
When finding the force of an object
@areebamaan4859 3 жыл бұрын
even better than every utube teaching channels .. thnx a lot for your support mammmmmmmm...,......
@chandagupta3539 3 жыл бұрын
Tomorrow is my exam .....it has helped me a lot......thank u so much
@THEBEATINBRAT 3 жыл бұрын
very nice explaination.......worth studying from magnet brains
@ashimasharma1972 2 жыл бұрын
I am a biology teacher but my students want me to study them physics also, your videos helped me a lot for preparing notes, for them. Thank you
@MagnetBrainsEducation 2 жыл бұрын
Ashima Sharma 19, Thanks a lot for watching the Magnet Brains videos. Please recommend us among your friends.
@rajendraprasadmahtha5130 3 жыл бұрын
Maam at 11:37 the change in momentum in first case is -10m/second square not only 10.😋😋
@Sumankumari-cd9ed 3 жыл бұрын
Good
@jayaverma9224 3 жыл бұрын
Yes
@shahidimran594 2 жыл бұрын
Thnku mam ..for helping us 🤗
@aarushiieee Жыл бұрын
Mam thank you soo much for this explanation .. My all doubts are clear ☺️☺️
@gopal.8905 3 жыл бұрын
Whare are you live mam! I want to read all time with you I became a great genius
@manjubala9526 3 жыл бұрын
Yes
@gargisingh9422 3 жыл бұрын
Yup..even though i too don't know...but she is the best ...and i do want to join the live class of mam
@SunilKumar-tk3qy 3 жыл бұрын
Really you need her and I agree but first please take a English grammar lecture of magnet brains as you need that the most right now! 😂😂😂(sorry to be this mean to you, please take it as a joke only. )
@awadheshyadav4633 3 жыл бұрын
I think they are from Bhopal
@aaradhya4422 3 жыл бұрын
@@SunilKumar-tk3qy use Article "an" before the word "ENGLISH" seems you need an english class too
@TGOD_7 2 жыл бұрын
Thank you today is my exam and this videos is just great😊 BTW who is studying at last moments🤣
@Mallikarjun-ij4fs Жыл бұрын
me tomorrow is my exam its night 11 o clock night 🤣🤣
@universaleye3308 3 жыл бұрын
Thnk u so much ma'am . For clearing my doubt . Thanks
@MagnetBrainsEducation 3 жыл бұрын
Universal Eye, Thanks a lot for checking out the video and replying back. Do recommend Magnet Brains to your friends. Also do checkout the Magnet Brains website, all video lectures are organized on the site for easy access.
@Ayushz53zX 2 жыл бұрын
Love you Vibhuti mam you are the best teacher of Physics Now I understand physics more better
@sakshikanswal6842 3 жыл бұрын
ma'am thank uhh so much everything is cleared too much may god bless uhh ma'am
@MagnetBrainsEducation 3 жыл бұрын
Sakshi Kanswal IX H 5852, Thanks for the reply. Wherever possible, please recommend us to your friends.
@anukaushik1166 4 жыл бұрын
Superb ma'am
@KNOWLEDGENATION-qh4ef 2 жыл бұрын
mam jo apne glass ka example diya ha usme jo glass break hua ha uski velocity -10kg m/sec aayegi apne second me to minus ka sign lga diya lekin 1st me nhi lgaya
@ishanansari557 2 жыл бұрын
Yes yahi maibhe kheany Wala tha
@ayeshashaikh5441 3 жыл бұрын
I can understand everything through ur video thank you👍👍
@MagnetBrainsEducation 3 жыл бұрын
Ayesha Shaikh, Thanks a lot for watching the Magnet Brains videos. Please recommend us among your friends.
@43unmilonaalamyan24 2 жыл бұрын
11:12 ma’am u wrote 10 kg m/s I think the answer should be -10 kg m/s.... but even if we take -10kg m/s then also the change in momentum is less (-5kg m/s) than that compared to the glass in the next case (cushion) ... but u told the change in momentum in the first case should be greater than the second one... can anyone explain this to me
@hardayan2099 2 жыл бұрын
I was also thinking about this
@hanumanbhakt5698 2 жыл бұрын
Ya I will also thought that concept
@mehvishali350 3 жыл бұрын
Mam, your explanation is very clear and amazing thanks for helping us ☺☺
@ankur2369 2 жыл бұрын
Ma'am it was easy to learn all the topic through your explanation # thank you
@seemamaheshwari8897 2 жыл бұрын
Mam in the case when grass broken in this why you have not taken(-10) because 0-10 is there
@MagnetBrainsEducation 2 жыл бұрын
Seema Maheshwari, Thank you for your comment. Do recommend Magnet Brains to your friends.
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