Multiple Choice Questions Chapter 4 Work and Energy l First Year Physics Federal Board KPK Syllabus

[@MuhammadAhsan-le6sd]

What's the logic behind 20% increase=1.2? At 8:33.....and how's 1.44 equal to 44%?

[@aminkhanamin7040]

Non conservation force are friction

[@zegarkhan-bo1zl]

the correct answer of first MCQS is (the force you pushing) because the crate moving down the ramp and we apply the force down so our force is greater then other force. if the friction force are greater then the crate dont move.

[@PhysicsLover119]

Force of friction is non conservative force because it depends on the path followed

[@CRICB2.0]

Sir,I think non-conservative force is friction. Also the force of friction has greatest magnitude because Force of gravity + Your force=Force of friction

[@ihsanullah8329]

Sir would you explain how friction force does greatest work

[@ihsanullah8329]

Thanks sir g

[@whoru515]

4.option (c) friction force

[@fscphysicswithqasim5334]

Plz explain ist mcq with the help of diagrame

[@hafsaabbasi16]

Sir in first mcq why we are considering frictional force as for doing greater work?

[@whynot5331]

Maybe because it is the only force working against our push and gravity.

[@zeynephala7176]

Sir mcqs no 10 mein kaise ap ne 1.44p ko % me convert Kiya hai plz bta dein

[@sapnarahim5827]

But frictional force is also no conservative in McQ 4

[@saheemKU77]

Yes true

[@omeasgaming4848]

Yes it is wrong frictional is correct

[@Itz_me_Polly]

K.E aur momentum waly formulas kesy ahiy ghy

[@rahmanali230]

"How 20% of p is 1.2" Mcqs 8

[@ghulammustafakhalid3538]

20% of 1 = 0.2 As 20% increases so total will be 1+0.2 = 1.2

[@SajjadKhan-jx4ql]

Sir mcq number 04 ko confirm kardey

[@farhanhaider4288]

Sir jub friction path ke hisab se change kya nahi hoti

[@sajawalhassan2767]

sir mcqs 10 mai 0.2 nahi ata 1.2 ki jaga

[@khansab8170]

Also check mcq no 4 the correct answer is frictional force

[@khansab8170]

Sir there is a confusion in mcq 1 because the greatest force will be the force you pushing as my point of view plz plz sir correct this answer

[@sidrakhan7116]

yes correct option is the force you pushing

[@HabibUrRahman-sr2wn]

Actually if u read the mcq it is saying velocity is constant so if the velocity is constant acceleration will be zero Now the force you apply will produce acceleration according to newton 2nd law F=ma here a=0 So F=0

[@HabibUrRahman-sr2wn]

Physical meaning in my sense would be that the gravitational component of force is providing enough force to move it down which is why the effect of the force you apply is comparatively zero....

[@RahanQureshi-w8z]

Sir in MCQ 4 option C is correct because it is dependent on path followed

[@areesha...7388]

Are these for federal board?

[@JamalPhysicist]

Yes

[@xiakpk]

Q#4???

[@Memoona-g2h]

Mcq 10 clarification: K.E'= 1.44p²/2m Since change in K.E is required so Change in K.E= 1.44p²/2m - p²/2m = 0.44p²/2m =0.44×100 =44%

[@SajedKhan-t3w]

Why is magnetic force is no conservative force?

[@itezwutitez.]

Because of variable force applied from it, therefore for example an object will feel less force when it's further from a magnet as compared to when it's near, and we know we divide work done by variable source into smaller interval, therefore overall work will be different of an object when it's further from the source as compared to it before near Or if you want a More simple ans......... it's not a closed system

[@SajedKhan-t3w]

Sir msqs ko tora explain Kia karen

[@tanzeelatanu7645]

Assalam-o-alaikum sir friction force b non-conservative hai?

[@omeasgaming4848]

Yes sir is wrong

[@sadamhussain8886]

Mcq 1 .option d is correct because body move in the direction of such force whose magnitude is greatest.

[@betteryou2.0]

how in 10th mcq, p is equal to 1.2??

[@omeasgaming4848]

Strt tution from me

[@ZarinaKhanum-h6v]

Option c and d both correct in mcq 4

[@fatimasohail5978]

JazzakAllah

[@xiakpk]

Q#4 C Corrett

[@hananqalandrani5709]

Sir mcq Pura samja b dia kary shukria ❤

[@JamalKhan-jj4nq]

Love you sir thank you Love you 💖💖💖💖😽💖

[@AbdulKarim-hr8hw]

In mcq 10, it is 0.2 p

[@betteryou2.0]

how come?? can you explain please.

[@farooqanjum5783]

4. Friction force is right

[@StudywithmeinPakistan]

Solved well. Buck up

[@abdurrehman5574]

MCqs number 4 is wrong plz correct this mcqs and mcqs no 1 be wrong ata ha kunki body motion me ha to greatest force the force which i push the carate . and mcqs No10 is wrong if we multiply 1.44 with 100 it gives us 144 not 44 which is wrong i really appreciate your effort thank you

[@mahnoorabbasi5613]

Check M.C.Q'S number 4

[@khansab8170]

U are right siso correct option is frictional force

[@dreamyland2926]

Sir mcq 13 mai 12 ki samj nai ai

[@PubgbattleCraft]

Sir please please chapter 5 ka long question upload karn

[@JamalPhysicist]

i will upload after completing mcq's

[@user-tq6dr5zf9u]

Nice 👍 Keep it up 🐱 And nice work 😊

[@JamalPhysicist]

Thanks 😄

[@user-tq6dr5zf9u]

@@JamalPhysicist u.welcome🖤❤️

[@HuzaifAli0987]

Sir in MCQ 10 how P’=1.2P?

[@ramlashahzad5077]

In initial p there's increase of 20% P+20÷100 (percentage conversion) Than l.c.m =6÷5p=1.2 p

[@CRICB2.0]

​@@ramlashahzad5077I can't understand plz clear it

[@ramlashahzad5077]

@@CRICB2.0 so its initial momentum was something in which there was "*increase*" of momentum which was 20 percent . So in final momentum we added 20% written as pi+20% Now we are going to concert this percentage to fraction value for which we divide the value by hundred 20 /100

[@hii7352]

P initially is = 1 but when increased by 20%, it bcomes 1+20%=1+20/100=1+0.2=1.2P

[@studywithsarasundusNatali]

Magnetic force is conservative

[@umarsaeed5948]

Mashallah sir Allah aff koo hamisha kiliaya khosh raki

[@JamalPhysicist]

Ameen. Jazakallah

[@Sanakhan-qn8oq]

Non conservative force is frictional force

[@rahulksharma854]

Superb sir 💖

[@motivationdaily683]

856 pm 3 2 2022 march

[@subhanullah2706]

Sir frictional force is non conservative force . Mcq number4 ans is wrong

[@JamalPhysicist]

ok

[@MohidJutt_295.]

sir ap ki muhjy turi sajme nahi aye

[@AliBhatti-qt8ot]

Friction is non conservative force

[@HabibUrRahman-sr2wn]

Sir mcq 4 is totally wrong ....non conservative force is frictional force.... magnetic force is conservative. Its just like electric force.

[@ilmehayat]

Aoa Monitiz ho geya chennal add chel reha tha ☝

[@JamalPhysicist]

w.salam ji monetize ho chuka hy

[@mohibali6121]

Sir plz upload all chap mcqs

[@JamalPhysicist]

i am trying

[@zinniakhan9607]

Torha har point ni clear kar skty

[@ultraphysics3661]

Check mcqs 4

[@abdulraziq3468]

1.44 percent is 144 not 44

[@FOOTBALLER7G]

If initial energy is 1 then change is .44 i.e 1+.44=1.44 which means increase is .44 which is 44%

[@pukhtunvines831]

Sir plz ye 10 number ke samajh bilkul ni aye

[@SajjadAli-yv5oy]

Frictional force non conservative force hai

[@farooqanjum5783]

First question samaj nahi aya

[@mhdaudkhan618]

Poor