Equations of Motion | Easy to Difficult Questions | Grade 9 | SHIKHAR 2024 |

[@rajeshwarimalusare9749]

I was not avlble to attend it live..but watched it later..Thank You Sir For this session 😊😊 Homework.. 1. B.1km/h 2. 7.5 secs

[@kiran_198]

1km kaise solution please

[@aashiya-o1w]

It is so helpful guys for those who all are preparing for examination then must watch

[@T_GungunTagore]

Homework Answers:- 1) option b 1km/s 2) final v=15ms-¹ , intial velocity=0 and time =2ms-² Since acceleration= change in velocity or time (a=(u-v)/t By putting all the values 2= (15-0)/t t= 15/2=7.5 seconds Hence , Police officer will match the speed of motorist in 7.5seconds

[@afraa76]

I couldn't come in yesterday's class 😔

[@T_GungunTagore]

@@afraa76 don't be sad you can watch recorded session too 😊

[@astha--]

Thanks for the session sir!! 😄 Please bring some more sessions on numericals because this chapter needs more practice😅😃 🔴 HOMEWORK:- QUESTION-1:03:19 ANSWER: For police officer= U= 0, V=15, A=2,T=? T= v-u/a Or, 15-0/2 Or, 15/2= 7.5 seconds(answer) Question 8 ( 48:02 ) Solution- For first 4sec, T=4 , s=24 , acceleration= a, initial velocity= u We can use 2nd eq. In this condition..... 2nd eq. = UT+1/2at²=s Or, Ux4+1/2xax4² Or, 4u+1/2xax16 Or, 4u+8a=24 Or, u= (24-8a)/4....... (First part) For next 4 seconds, T= 4+4= 8sec. S=24+64=88 Acceleration=a Initial velocity= u We can use 2nd eq. S=ut+1/2at² Or, RHS= 8u+1/2xax8² Or, 8u+1/2xax64 Or, 8u+8a= 88 Or, u= (88-32a)/8...... (Part 2) NOW, IF WE NOTICE... WE HAVE PART 1 AND 2 WITH SAME L. H. S... By comparing, Part 1=part 2 Or, (24-8a)/4=(88-32a)/8 After solving it, we will get a=2.5km/s² WE HAVE A=2.5 NOW, WE CAN PUT IT IN ANY EQUATION, BECAUSE WE DON'T HAVE TO FIND ACCELERATION, QUESTION IS ASKING FOR INITIAL VELOCITY.... after putting it in any of two equations ( 4u+8(2.5)=24 or in 8u+32(2.5)=88) We will get the same answer .... That is 1... Thus, answer is option b...1

[@M.LifeE.2007]

How can we solve 1st H.W question pls tell me it's little confusing 😐 48:08 And BTW you have written T = v-u/t instead of v-u/a 😀

[@astha--]

@@M.LifeE.2007 hey, thanks for correcting my mistake 😃 Answer- For first 4sec, T=4 , s=24 , acceleration= a, initial velocity= u We can use 2nd eq. In this condition..... 2nd eq. = UT+1/2at²=s Or, Ux4+1/2xax4² Or, 4u+1/2xax16 Or, 4u+8a=24 Or, u= (24-8a)/4....... (First part) For next 4 seconds, T= 4+4= 8sec. S=24+64=88 Acceleration=a Initial velocity= u We can use 2nd eq. S=ut+1/2at² Or, RHS= 8u+1/2xax8² Or, 8u+1/2xax64 Or, 8u+8a= 88 Or, u= (88-32a)/8...... (Part 2) NOW, IF YOU NOTICE... WE HAVE PART 1 AND 2 WITH SAME L. H. S... By comparing, Part 1=part 2 Or, (24-8a)/4=(88-32a)/8 Now you just have to solve equation.... After solving it, you will get a=2.5km/s² WE HAVE A=2.5 NOW, YOU CAN PUT IT IN ANY EQUATION, BECAUSE WE DON'T HAVE TO FIND ACCELERATION, QUESTION IS ASKING FOR INITIAL VELOCITY.... after putting it in any of two equations ( 4u+8(2.5)=24 or in 8u+32(2.5)=88) You will get the same answer .... That is 1... Thus, answer is option b...1km/s You will not get this question untill you try😃 so , try this once yourself:)

[@M.LifeE.2007]

@@astha-- thank you 😊 so much that you solve and convence me, ʘ⁠‿⁠ʘ Thank you 😊 again 🤗

[@astha--]

@@M.LifeE.2007 that's my pleasure ☺️

[@ankusaini6092]

Thanks for the solution astha🤜🏻🤛🏻

[@manojshukla6313]

What is the short method to solve question number 7?

[@LONELYLEGEND-xj1hg]

We can do the 4th question with only one equation S=Vt-1/2atsquare By substuting values S=(0)t - (-3) x 16/2 S= 24 m Those who did by using this 😅 👇

[@AyushPandey-n4x6f]

@@LONELYLEGEND-xj1hg I Did It By using this and felling like Genius!!!😄😂

[@rekham5050]

2:20

[@susmitapahari8583]

Final velocity v = 15 m s − 1 Initial velocity u = 0 m s − 1 Acceleration a = 2 m s − 2 Since, acceleration = change in velocity/time a = ( v − u ) / t Substituting values 2 = ( 15 − 0 ) / t t = 15 / 2 = 7.5 s e c o n d s

[@Khushman-p2w]

⭐Homework 1. 1m/s 2.7.5second By Jagdeep Singh Sidhu

[@Full_inch]

😊😊

[@strenuousgaming6954]

Sir please gave solution the solution of questions 8 48:07

[@TusharKumar076]

48:19

[@Avni-447]

Thank you Saurabh sir for this amazing practice session!😃😃😃 Homework Question Answer: (1) 1km/s (2) The police will match the motorcyclist's speed in 7.5s

[@kiran_198]

1km kaise ?? Solution please

[@Avni-447]

@@kiran_198 First use the Second equation of motion where s=24km, t=4s You will get an equation: 24=4u+8a...(i) Again use the Second equation of motion for the total distance and total time (s=88km and t=8s) You will get an equation: 8u+32a...(ii) On solving (i) and (ii) we get u=1m/s Thus, initial velocity is 1km/s

[@kiran_198]

@@Avni-447 thanks sis ❤️

[@Anshu_Editz896]

😂😂😂😂😂😮😂😮😂😮😂😮😂😮😂😮😂😮😂😮😂😮😂😮😂😮😂😮😂😮😢😂😢😂😢😂😢😂😢😂😢😂😢😂🎉😂🎉😂🎉😂🎉😂🎉😂❤😅❤❤😊😅😂e😮😂😮😂😮❤😮😂😮😮😂😅❤😮😂😅❤😮😅😮😅😮🎉❤😂😅❤😮😂😅❤😮😂😅❤😮😮😢😮😢😢❤😮

[@Munnakumar-mb8ys]

Home work ans Sorry i didn't understand the first one i will try after some time meanwhile the second one is u=0 a=2m/s sq v= 15m/s so using equation one we can solve it V=u+at 15=0+2×t 15=2t t=15/2 t=7.5 seconds -Meenu raj ❤😊

[@Full_inch]

I hadn’t understood 😢

[@rekham5050]

2:40 2:41 2:42

[@T_GungunTagore]

Thankyou sir for taking a session on numericals 😃 It's so helpful for our practice ✨

[@virendra0761]

😊 11:17

[@geetanjali87db]

TYSM SOO MUCH SIR, NOW I'VE GAINED CONFIDENCE IN DOING NUMERICALS MUCH AND EVERRR... 💯

[@T.T_Chaurasiya]

Sir mujhe kuchh smjh nhi aya mai kya karu??

[@DileepKumar-pz5fu]

Amazing session Hw v=u+at 0=15+2×t t=15/2 t=7.5seconds

[@JaneAnahi-mj5kg]

Thank you for the session sir,I need a bit practice to clear my understanding Hw) 1)1m/s 2)7.5sec🎉🎉

[@strenuousgaming6954]

Sir 48:08 question number 8

[@vijayalbert6791]

sir , I can't understand the 4th question in medium level

[@shourya__gupta]

Can anyone give me the explanation of the question 8

[@roshan1269]

For 5th question we can use. S=(u+v÷2)×t one try sir

[@yogitasharma3564]

Sir Can u please tell that in medium level Q5 in Second equation why u not write 10 as the equation is s=ut+1/2at² so the value will place is o ×10+1/2×10²but u wrote o×1/2×2×10²...sir please tell where i m doing Mistake...its helpful session thank you byjus for such an amazing teacher 👍

[@Idkwimgdwml7895]

0×10=0 na

[@mightycraftandother715]

1. 1km/sec 2. 7.5sec H. W

[@mythicytop2.029]

24:31 Bro how are you getting 24 wthhh

[@Full_inch]

If you use the second equation you see there is plus after UT but in retadation it’s minus because it’s a negative force (now try it) 😊

[@adhishchopra575]

Homework 7.5 sec ans

[@akhilkhan6027]

Can we take g=9.8m/s also?

[@GowthamprakashRajana]

Yes

[@Full_inch]

Hey had mentioned it in question 10m/s (it’s a condition) so not 9.8

[@Full_inch]

@@GowthamprakashRajanawe can’t (for this question) -_-

[@shaziamunvvar4930]

please change the class time

[@Khushman-p2w]

5.question in minti I found it difficult

[@rashmikaushik7475]

Sir I can't understand medium level question no.4

[@subhashridash9018]

Thanks for this amazing session.🙂 I am not able to attend the classes live as I have my tuitions during the same time. 🙁 📖HW- 1) I am not able to solve this till now.🤔 2) v for motorcyclist= 15m/s u for police= 0 a for police= 2m/s² required v by police= 15m/s Applying 1st equation t= (v-u)/a =>t= (15-0)/2 t=7.5sec😇 Please bring more sessions on equations of motion, please🙏

[@techhelper1806]

48m

[@sravanthi186]

hi sir i am saileyi

[@yashmitwagh4319]

😮

[@yashmitwagh4319]

Bohot accha tha sir

[@rakeshrakhi9370]

C

[@dineshchoudhary6006]

d

[@SanthiyaguMaria]

20 m/s

[@shourya__gupta]

I think u all searched the question from Google and just typed here to make urself homework superstar i don't think so that this question was easy

[@ANANDKUMARSINGH-s7j]

1km/s

[@yooblockmango1542]

sir 4 question to bina u find ke hi agaya

[@NaveedKhan-ef2mg]

Omg main aaisa hi kuch dondh rahi thi

[@manjeet1507]

A) 1 km/ hr or 1km / sec 😢(CONFUSED) 😢 B) 7.5sec 😀 🎉

[@SanthiyaguMaria]

1m/s

[@jasbirjakhar6433]

hw question given u=0m/s t=? a=2m/s square v=15m/s [ as the police officer want reach the speed of motorist ] using- v=u+at 15=0+2*t 15=2*t t=15/2 =7.5 sec thanks a lot for the session sir .

[@rajendranv1701]

Motta punda sunny miru

[@venkateswararaob8381]

Sir why are you explaining the answers in speed not clearly . Its hard to understand😭😭😭😭

[@mohammadashad9110]

Bahyt ghatiaa padhatee hoo thode dhiree padhaya karo hamko bhi tum joo samjhaa rahe ho voo aahi nahi raha hai pahale aap achaa padhanaa sikho fir padhanaa ulllu teacher

[@Full_inch]

Kuch respect karo vo teacher hai 😡 theme samaj nahi aya Baki logo ok aya you hai ullu 😡