Physics Paper 12 How was it

[good man12]

ya evn i got da 2nd one wit low resistanc

sorry for untidiness

 

[fathimaash]

sorry for untidiness

View attachment 13121

ya u r ryt...

 

[Mattman]

Wasn't the component vectors on c??
I don't know about th strain energy part.. I did 1/2(25+20)x7mm and I got approx 8..

 

[mhalvi]

i think your 9th is not correct.. i think... becuaue ice was frictionless but the wall was rough.. so frictional component was always there.. so answer was B..

you are absolutely right!!

 

[Saad Sarfraz]

i suppose 24 hours are gone and so here is the list i made.........

u got the 13th one wrong it was 1.5x10^5 and well u got that momentum of bodies question right..it was D not A...infact it was also a repeat..and question 5 was D for sure..and question 16 was C.."distance between collision decrease" bcz they askd for what does not happen and well the collisions per second do increase...and qstn 34 it wasnt B it was C...8 mgh...u take height from where weight acts and it acts in the centre of the block...

 

[good man12]

Wasn't the component vectors on c??
I don't know about th strain energy part.. I did 1/2(25+20)x7mm and I got approx 8..

vectord was d, rsin0, and rcos0

 

[good man12]

u got the 13th one wrong it was 1.5x10^5 and well u got that momentum of bodies question right..it was D not A...infact it was also a repeat..and question 5 was D for sure..and question 16 was C.."distance between collision decrease" bcz they askd for what does not happen and well the collisions per second do increase...and qstn 34 it wasnt B it was C...8 mgh...u take height from where weight acts and it acts in the centre of the block...

we werent suposed to add atmospheric pressure in the gas question so it was B the o.5 one, and i checked the momentum one, the options got switched around so it was wrong,. and im certain in pressure one since pressure was constant, the collisions with piston remain the same, else pressure should increase, the weight was 6mgh, i can show you

 

[Mattman]

vectord was d, rsin0, and rcos0

Yeah that was c I think
D was like horizontal component=Q or something
Can anyone tell me what the momentum question was?

 

[good man12]

we werent suposed to add atmospheric pressure in the gas question so it was B the o.5 one, and i checked the momentum one, the options got switched around so it was wrong,. and im certain in pressure one since pressure was constant, the collisions with piston remain the same, else pressure should increase, the weight was 6mgh, i can show you

 

[fathimaash]

wat was da value for da moment question dat 1/4L thing...

 

[zain tariq]

u did have to add the atmospheric pressure im sure about that

 

[good man12]

wat was da value for da moment question dat 1/4L thing...

wL/4 clockwise

 

[good man12]

u did have to add the atmospheric pressure im sure about that

atmospheric pressure is 100000 pa = 100000N m squared.....i have never seen a test tube in my life with a surface area of 1 m squared, so how can u justify that 100,000 newtons is acting on it!!!!!!!!!!!!!it does act but it is negligible................

 

[fathimaash]

wL/4 clockwise

really it was anticloskwise i gusss

 

[syaukani_93]

wat was da value for da moment question dat 1/4L thing...

It was LW/4 in clockwise direction as the torque produced by the weight of the block was LW/4 in anticlockwise direction .

 

[zain tariq]

@ gud man,,,the gas could not have pushed the other side of the liquid without having pressure greater than atm pressure...o level concept

 

[good man12]

@ gud man,,,the gas could not have pushed the other side of the liquid without having pressure greater than atm pressure...o level concept

did they ask pressure difference or gas pressure?

 

[Mattman]

What I don't understand is that where is the clockwise force on the block... I awnser d as well, but I didn't rly understand.

 

[zain tariq]

gas pressure

 

[nicoles]

wow..u guys actually remembered all the questions! haha..but i don't understand about the 1C question.