Q12 & Q13 Back Exercise NCERT | Chapter 9 | Force And Laws Of Motion | Class 9 Science

In this session we will be starting with the chapter "Force And Laws Of Motion".
We will cover Q12 & Q13 of back exercise of chapter 9.

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#class9science #forceandlawsofmotion #learnwithmansi

[krishna]

Mam the correct formula is delta P = MV - MU

[The.Vlogger.Bhavar]

your is correct but answer -3kg aaraha hein or hame magnitude nikalna hein magnitude yani positive numerical value agar answer ko magnitude mein convert karre toh 3kg ata hein

[niyazahmad]

hence proved formula is a game changer

[shubhangsathavara]

Mam Q 13 is wrong . The formula is p=mv-mu so the ans will be -3 not 3 ( -3 is the ans in NCERT also )

[aayatkhan]

Mam i think some mistake is here because there is not mu-mv there is mv-mu

[Parth]

Q13 is wrong wrong formula the correct is -3 but NCERT has also written it 3 i am totally confused about it

[v.jayeshdhanariya]

Mam after your explanation please be aside because we want to copy that for notes

[IAF_editz]

Mam in question 13 change is momentum is = mv - mu

You have written= mu-mv

So answer will be -3 not 3

[shitalmankar]

It is
p=mv-mu
Therefore answer will be, -3kgm/s

[vrmmeht]

Last answer is wrong 😅
Because the formula is mv-mu

[muflehasajid]

Ma'am there is some mistake it's m(v-u) so.2(-5-10)
.2 ×-15 = -3

[jaat-mpgt]

Mam iske baad work and energy chapter karva Dena mam please please please

[manjukumar]

Mam Please take Improvement in Food Resources chapter bio....

[aloneboy]

Q.13 answer was wrong because formula is mv-mu

[rajneeshanjia]

Mam may be the students justification is correct because the student says that the both forces cancel out each other and u also said that

[raisartz]

Just remind you all that we've been asked about the MAGNITUDE of the momentum which is a scalar quantity. Hence the answer is in positive. So after you find out the answer you may mention at the end by writing
Therefore, the *magnitude* of the momentum is 3kg.m/s

[ritikabhosale]

thanku u maam your explanation is so helpful

[mamtaprajapat]

Ma'am please is matter around us pure karva do

[zeenatkhan]

Mam pls make a video on a sound ch mujhe uus ch meh kuch samajh nhi aa rha or 15 Feb ka paper h :(

[SHORT.ZONE.]

Mam final momentum pehle aayega initial baad me