Physics: Post your doubts here!

[smzimran]

Are the revision notes provided my xtremepapers for AS only or is it for A2 as well?
and are they a good source to study from??
cuz i printed it and i wnted to knw whether it is a good source or not

I think they are 4 A2 as well.

 

[farhan143]

How do you calculate the braking force
for example if a motorist is travelling at 10ms^-1 bringing his car to rest in a distance of 10m ....

how to you find the braking force for this???

 

[smzimran]

How do you calculate the braking force
for example if a motorist is travelling at 10ms^-1 bringing his car to rest in a distance of 10m ....

how to you find the braking force for this???

Find the deceleration, a
Braking force = ma + driving force

 

[farhan143]

do you know a link for a list of all the formulas for physics as contents??

 

[farhan143]

coud you just solve that question for me......
i get the formula but i cnt solve it!

 

[smzimran]

coud you just solve that question for me......
i get the formula but i cnt solve it!

What is the driving forceand the mass of the vehicle? post the complete question

 

[farhan143]

nothing is given

it is :
a motorist travelling at 10ms^-1 can bring his car ot rest in a distance of 10m
if he had been travelling at 30ms^-1, in what distance could he bring the car to rest using the same braking force ?

A) 17M
B) 30M
C) 52M
D) 90M

 

[smzimran]

nothing is given

it is :
a motorist travelling at 10ms^-1 can bring his car ot rest in a distance of 10m
if he had been travelling at 30ms^-1, in what distance could he bring the car to rest using the same braking force ?

A) 17M
B) 30M
C) 52M
D) 90M

answer is D) 90m
U dont need the braking force in this question.
Just find out the accceleration by using
2as = v^2 - u^2
where s=10, v=0, u=10
You will get a =5
Now substitute a = 5 in the same equation this time with u = 30, v=0
find out s = 90.

 

[farhan143]

THNKS

 

[smzimran]

THNKS

Ur welcome bro

 

[farhan143]

COULD U HLP ME OUT WIT SME PAST PAPERS ...
i need hlp in p1 and p2 cuz today i tuchd it!
hehehe

 

[smzimran]

COULD U HLP ME OUT WIT SME PAST PAPERS ...
i need hlp in p1 and p2 cuz today i tuchd it!
hehehe

Sure, just post ur questions.
U r in AS, right?

 

[farhan143]

yes i am in AS and am goin to gve my as levels exam in this coming may!
what about you

 

[smzimran]

yes i am in AS and am goin to gve my as levels exam in this coming may!
what about you

You may check my profile for my information in the information bar. I dnt want to type it all over again.

 

[farhan143]

what is a veritcal component and a horizontal component??
i mean how do you find it
4 example the question in 2003 may/june P1 q7
pls chck it out

 

[smzimran]

Can you post the link to this paper?

 

[smzimran]

Thanks man. Can you also have a look at question 2 b i and ii? I suck at questions involving ratios. Simply go blank.

Q 2 b has only one part and it is aboutfield strength not ratios

 

[farhan143]

Does anybody have the formulae list for As/A level physics

 

[aliya_zad]

It's there on the first two pages of every pastpaper!

 

[farhan143]

I kno that.... thank you!.......but
no, i mean the complete formula list for all the chapter in physics...
past papers don't give the full formulae list of all the chapters from AS