Physics P1 and P2 Discussions

[Shadow]

Can't we use a bar-code detector or something

Thats the point ... there is no remedy for this ambiguous situation

 

[Suchal Riaz]

I dont quite remember my answer ... Did u calculate G.P.E by adding both the weight of sand n the trolley (or watevr it was) ?

Then ur answer is probably wrong.
As the trolley has returned back so the change will be only for sand.

 

[Shadow]

Then ur answer is probably wrong.
As the trolley has returned back so the change will be only for sand.

 

[thementor]

I dont quite remember my answer ... Did u calculate G.P.E by adding both the weight of sand n the trolley (or watevr it was) ?

just used weight of sand....

 

[asma tareen]

Then ur answer is probably wrong.
As the trolley has returned back so the change will be only for sand.

-________- gr8 most of my ans are wrong :'(

 

[Suchal Riaz]

-________- gr8 most of my ans are wrong :'(

Don't worry. Girls ke liye A* 50% pe hota he.


(I m talking to dadi jan s any other girl please don't mind)

 

[Buland Iqbal]

Don't worry. Girls ke liye A* 50% pe hota he.


(I m talking to dadi jan s any other girl please don't mind)

Yar Suchal, fleming left hand walay sawal mai kon si option choose ki thi?

 

[Suchal Riaz]

Yar Suchal, fleming left hand walay sawal mai kon si option choose ki thi?

Downwards as far as I remember.

 

[Suchal Riaz]

And Buland what do u at about my answers In which I tagged you.

 

[asma tareen]

Don't worry. Girls ke liye A* 50% pe hota he.


(I m talking to dadi jan s any other girl please don't mind)

Yar mera to A aajaye us par bhi khush hun but ab uska bhi koi imkaan nazar nai aaraha or kaash aapki baat sach hoti

 

[Suchal Riaz]

Yar mera to A aajaye us par bhi khush hun but ab uska bhi koi imkaan nazar nai aaraha or kaash aapki baat sach hoti

Allah khair kare ga

 

[asma tareen]

Allah khair kare ga

INSHAALAH

 

[Shadow]

-________- gr8 most of my ans are wrong :'(

Dont consider urself alone

 

[asma tareen]

Dont consider urself alone

Lol are u talkin abt urself

 

[Shadow]

Lol are u talkin abt urself

Yea, maybe, to sum extent

 

[Buland Iqbal]

I don't have time to read whole thread as I have to prepare for add maths and computer so please tell me why my argument is wrong by giving a reason why my logic is wrong.

As the truck has returned from the top, the overall change in g.p.e will only be on sand. Mass of only sand will be taken in formula.
The current will be divided into 5 other parallel circuits so each appliance won't get high current so only socket will be over heated
As the bulb has been broken, the volt meter will now be in parallel to whole battery so it's reading will increase. The resistance of bulb and volt meter in parallel was less than resistance of volt meter alone so due to more resistance the ammeter reading will decrease.
As the diver was in high speed and slowed down it's kinetic energy is changing into heat and as the height was decreasing the g.p.e was changing into heat energy. No potential energy was changed into kinetic energy. So overall equation will reduce to g.p.e + k.e --> heat energy
Saad Mughal Buland Iqbal Haris Bin Zahid

Quite frankly this is bullshit, nah I'm just kidding That question with GP is something I'm confused about. Your ideology seems alright but I'll stick to my answer, i.e 7500000. I attempted the other questions similarly. However, my energy changes in the last question mentioned contradict yours.

 

[Suchal Riaz]

Quite frankly this is bullshit, nah I'm just kidding That question with GP is something I'm confused about. Your ideology seems alright but I'll stick to my answer, i.e 7500000. I attempted the other questions similarly. However, my energy changes in the last question mentioned contradict yours.

Man i asked for reasoning? I m not doing debate but but i want to reach to conclusion. I cant wait for the markschemes to come.

 

[Buland Iqbal]

Man i asked for reasoning? I m not doing debate but but i want to reach to conclusion. I cant wait for the markschemes to come.

Okay, firstly change in gravitational energy would occur to the truck and the sand. Initially they are at the ground, i.e zero G.P and as they move up, both the sand and truck would possess max GP. This would be described as the change in G.P so 7500000 should have been the answer. Other than this, since the diver was falling in the pool, the situation could be compared to that of a parachutist, i.e GP converted to KE and as this conversion is occuring, dissipation of energy would occur so the energy conversion should be GP--->K.E + Thermal.
Hope this gets you to your conclusions.

 

[Suchal Riaz]

Okay, firstly change in gravitational energy would occur to the truck and the sand. Initially they are at the ground, i.e zero G.P and as they move up, both the sand and truck would possess max GP. This would be described as the change in G.P so 7500000 should have been the answer. Other than this, since the diver was falling in the pool, the situation could be compared to that of a parachutist, i.e GP converted to KE and as this conversion is occuring, dissipation of energy would occur so the energy conversion should be GP--->K.E + Thermal.
Hope this gets you to your conclusions.

Frstly buland truck returned back to the ground so the change of gpe of truck is zero. If u throw a ball and it come back to ur hand, change will be zero. They asked OVERALL not DIFFERENCE BETWEEN MAXIMUM AND MINIMUM.
secndly, u did not read the question completely.
It said a HGH SPEED diver slowed down and then stopped.
Means not just gpe is converting into internal enegy but kinetic is also changing ad it was high speed. And no gpe is being converted into kinetic energy, but the kinetic energy it had is also decreasing. G.P.E + K.E ----> heat energy

And leave it more importantlyn what do u think about the answer of broken filament question. Sir naeem told me that volt meter have very high resistance. So their resistnce combined in pallel will be less than resistance of volt meter alone in series. What do u say. And now the volt meter will show the emf of battery as it is parallel to battery.
What do u say?

 

[Buland Iqbal]

Frstly buland truck returned back to the ground so the change of gpe of truck is zero. If u throw a ball and it come back to ur hand, change will be zero. They asked OVERALL not DIFFERENCE BETWEEN MAXIMUM AND MINIMUM.
secndly, u did not read the question completely.
It said a HGH SPEED diver slowed down and then stopped.
Means not just gpe is converting into internal enegy but kinetic is also changing ad it was high speed. And no gpe is being converted into kinetic energy, but the kinetic energy it had is also decreasing. G.P.E + K.E ----> heat energy

And leave it more importantlyn what do u think about the answer of broken filament question. Sir naeem told me that volt meter have very high resistance. So their resistnce combined in pallel will be less than resistance of volt meter alone in series. What do u say. And now the volt meter will show the emf of battery as it is parallel to battery.
What do u say?

Yeah I guess you are right about the two. However, I don't remember that broken filament question. Anyways which option did you choose in P1 question 30 summer 2003? This question appeared in our exam as well.