Physics Unit 4 JUNE 11/6/12

[étudiante]

ok i wanna ask u q(11) is it necessary 4 us?

I dont think so, as it would be part of the Unit 6 (part a i mean) but part b can be either

 

[*Sandra*]

I dont think so, as it would be part of the Unit 6 (part a i mean) but part b can be either

ya ok i ned help also 4 q(12)last part and q(14) whn they ask abt verification tht rope won't slack and sry again

 

[étudiante]

ya ok i ned help also 4 q(12)last part and q(14) whn they ask abt verification tht rope won't slack and sry again

Sure no problem n dont apologize please Its practice for me too

Just give me a while, m still revising the chapter

 

[*Sandra*]

Sure no problem n dont apologize please Its practice for me too

Just give me a while, m still revising the chapter

ya sure and btw u wil revise it frm the book or revision guide?

 

[étudiante]

ya sure and btw u wil revise it frm the book or revision guide?

The revision guide

btw for Q4 ii, I checked the mark scheme, and the formula they r using is new to me
But u can do it using Gradient of the steep straight part

 

[*Sandra*]

The revision guide

btw for Q4 ii, I checked the mark scheme, and the formula they r using is new to me
But u can do it using Gradient of the steep straight part

actually i did it by taking time as 0 when max velocity is v=Ax(angular velocity)do ths and check

 

[étudiante]

actually i did it by taking time as 0 when max velocity is v=Ax(angular velocity)do ths and check

ohh.. but how is the v maz at t=0? :S Souldnt v be 0 at that point? :S
and which formula is this? Never seen it before!

 

[*Sandra*]

ohh.. but how is the v maz at t=0? :S Souldnt v be 0 at that point? :S
and which formula is this? Never seen it before!

v is max whn it is in the equilibrium position so i guess its zero time and displacement is also zero and its the same formula for velocity bt cuz (A x angular velocity x sin x angular velocity x time is zero so A x angular velocity is left)

 

[étudiante]

v is max whn it is in the equilibrium position so i guess its zero time and displacement is also zero and its the same formula for velocity bt cuz (A x angular velocity x sin x angular velocity x time is zero so A x angular velocity is left)

i still dont get it, at t=0 the velocity is max according to the graph right? :S so the gradient at that point (that is the velocity) will be 0 isnt it? :S isnt v max when h =0? :S
ohhh den i used this formula too

 

[*Sandra*]

i still dont get it, at t=0 the velocity is max according to the graph right? :S so the gradient at that point (that is the velocity) will be 0 isnt it? :S
ohhh den i used this formula too

ya i kno tht whn they say max velocity it means displacement is zero hence also time wil be zero at equilibrium position ths wat i kno i don kno if its correct

 

[*Sandra*]

v is max whn it is in the equilibrium position so i guess its zero time and displacement is also zero and its the same formula for velocity bt cuz (A x angular velocity x sin x angular velocity x time is zero so A x angular velocity is left)

ohhh sry t wil nt be zero according 2 the graph i wil do the que again

 

[étudiante]

ya i kno tht whn they say max velocity it means displacement is zero hence also time wil be zero at equilibrium position ths wat i kno i don kno if its correct

i'm confused y ur saying dat t=0 when when displacement is 0, if u see this particular graph, i think its at 0.32s
dw, m not sure on this myself cuz my answer comes 1.7

 

[étudiante]

ohhh sry t wil nt be zero according 2 the graph i wil do the que again

No problem But i'm not getting the answer :S I'll try again...

 

[*Sandra*]

No problem But i'm not getting the answer :S I'll try again...

still i didn study astrophysics i didn finish anythng til nwim affraid if time won't fit me

 

[étudiante]

still i didn study astrophysics i didn finish anythng til nwim affraid if time won't fit me

SAME HEREEEEEEEEEEEEEEEE I have to do bio as well and i just started physics -____-"
BUT we'll manage SOMEhow Inshallah dw

 

[*Sandra*]

SAME HEREEEEEEEEEEEEEEEE I have to do bio as well and i just started physics -____-"
BUT we'll manage SOMEhow Inshallah dw

ya sure inshalla

 

[*Sandra*]

SAME HEREEEEEEEEEEEEEEEE I have to do bio as well and i just started physics -____-"
BUT we'll manage SOMEhow Inshallah dw

just 1 more last que in june 10 last part of the last que

 

[étudiante]

just 1 more last que in june 10 last part of the last que

Keep em comming no problem n just 1 sec, i'll check dat...

did u get the answer for 4? I did the rest of that question, what did u want me to explain again?

 

[étudiante]

just 1 more last que in june 10 last part of the last que

Can u please the paper cuz i dont have it

 

[*Sandra*]

Keep em comming no problem n just 1 sec, i'll check dat...

did u get the answer for 4? I did the rest of that question, what did u want me to explain again?

last part of last que and 4 que (4) i got stuck in amplitude