Physics: Post your doubts here!

[Tsurace]

hey can anyone help please.............I have physics practical exam AS. Can anyone guess about the questions or suggest me the topics to prepare?

 

[PinkRhinos]

hey can anyone help please.............I have physics practical exam AS. Can anyone guess about the questions or suggest me the topics to prepare?

Experiments involving Newton's second law.

 

[raamish]

why do we use travelling microscope does any1 know?

 

[geek101]

why do we use travelling microscope does any1 know?

it can be used when you wanna find the extension of a stiff material, i think. you put a mark and place it under that microscope..so very tiny extensions can be determined = )

 

[hussamh10]

http://olevel.sourceforge.net/papers/9702/9702_s12_ms_22.pdf Q1 part 2 when we add up % error it come 8.5 why it is 8.6 wriiten in ms and als in Q2 when we caculate the speed it come 12.986 why it is written 12.99 and then also used in the next part as 12.99 .12.99 is 3s.f?

 

[Silent Hunter]

AOA

http://www.xtremepapers.com/papers/...nd AS Level/Physics (9702)/9702_w10_qp_22.pdf

Q2(a)(ii) ...... am getting different answers by 2as = v^2 - u^2 and by using s= ut + 0.5at^2 ??
reason? anywhere am going the wrong way please inform
thank you

 

[queen of the legend]

http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s10_qp_31.pdf
Q.2 part (c) (iii)
http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s10_qp_33.pdf
Q.2 part (c)
http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s10_qp_34.pdf
Q.2 part (c)

you are asking question from paper 3 ....there are uncertainty questions in paper 2 as well !
the questions you have asked are part of the whole experiment ....its not possible for me to know the timing recorded unless i do the expt my self !!
please go through some uncertainty in paper 2 ......i will try to help you out as much as i can

 

[queen of the legend]

http://olevel.sourceforge.net/papers/9702/9702_s12_ms_22.pdf Q1 part 2 when we add up % error it come 8.5 why it is 8.6 wriiten in ms and als in Q2 when we caculate the speed it come 12.986 why it is written 12.99 and then also used in the next part as 12.99 .12.99 is 3s.f?

In both cases it has been rounded

 

[D0cEngi]

you are asking question from paper 3 ....there are uncertainty questions in paper 2 as well !
the questions you have asked are part of the whole experiment ....its not possible for me to know the timing recorded unless i do the expt my self !!
please go through some uncertainty in paper 2 ......i will try to help you out as much as i can

Well the uncertainities in paper 2 are very easy....I wanted help with this ppr 3 thingy...btw thanks for ur time...

 

[D0cEngi]

URGENT HELP NEEDED...:
how do we show that the relationship given is satisfied..?
(Values of K)...its from paper 3...

 

[queen of the legend]

AOA

http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w10_qp_22.pdf

Q2(a)(ii) ...... am getting different answers by 2as = v^2 - u^2 and by using s= ut + 0.5at^2 ??
reason? anywhere am going the wrong way please inform
thank you

you should consider initial vertical velocity ut when calculating for s .....and the way to do that is in the ms

 

[queen of the legend]

Well the uncertainities in paper 2 are very easy....I wanted help with this ppr 3 thingy...btw thanks for ur time...

well if you do think uncertainty in paper 2 is easy then paper 3 would be easy too .......anyhow uncertainty of a device is least value it can measure ....welcome for ur understanding!!

 

[D0cEngi]

well if you do think uncertainty in paper 2 is easy then paper 3 would be easy too .......anyhow uncertainty of a device is least value it can measure ....welcome for ur understanding!!

the thing is that in ppr 2 the readings are given and in ppr 3 we have to calculate them from the instrument being used..

 

[raamish]

any1 know the detailed use of the set square. in marking scheme it is given: write detailed use of set square. do u know when measuring height how do we tell how the setsquare is used to check if the ruler is vertical?

 

[D0cEngi]

any1 know the detailed use of the set square. in marking scheme it is given: write detailed use of set square. do u know when measuring height how do we tell how the setsquare is used to check if the ruler is vertical?

by placing the set square adjacent to ruler and seeing that it's one side is parallel with the ruler and other with the table on which the ruler is placed..

 

[raamish]

thanx a lot

 

[Silent Hunter]

any method for the estimations type questions?

 

[Tasnim Akhter]

hey can anyone help me with ON'06/02/1.c.ii and 2.c.iii

 

[hussamh10]

http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w11_qp_21.pdf
Q2 c part how to determine what is the pivot to be taken

 

[hussamh10]

hey can anyone help me with ON'06/02/1.c.ii and 2.c.iii

K.e=1/2 mv^2
=692550

power=workdone/time
=692500/8.1
85500 W
there is a resistive force acting which causes the acceleration to reduce or p=fv=mav
P and m are constant se when v increase a decrease