Physics: Post your doubts here!

[Laila39]

Omgg thankyou SOOO much. Really appreciated.

 

[ashcull14]

k= gradient
(convert the mm into metre)
k=12/0.06
k=200
right??

ryt,,,thns a lot

 

[Asad Moosvi]

use

the formula d1/d2=h2/h1
hq/hp=2/3

That's the wrong answer

 

[ashcull14]

k= gradient
(convert the mm into metre)
k=12/0.06
k=200
right??

but why dd u divide 12 by 0.06..why not 8/0.06

 

[Thought blocker]

june 2003 please explain numbers :
10
11
13
19
20
22
28
29
35 why not b
36?????

10)
Force = mass times acceleration
total mass = 4m so,
F=4ma
a=F/4m
F(Y)=3m x F/4m = 3F/4

11)
There will be a contact force and a driving force...
so resultant vector would be in between them.

13)
Lol what's wrong ?

19)
B, read the text book

20)

22)
Case i)
When all 3 springs are attached to the load W :
So, think.. If you have 3 springs and you have 1 weight attach to them what will be the force for each string ?
It would be W/3
So we know F = kx
k = W/3x

Case ii)
When middle spring is removed and 2W load is attached to them :
So, think again, what would be the force for each string ?
It would be W
So you know the value of k i.e is W/3x and constant doesn't change, as it is named as constant itself.
so considering :
F = kx
x = W / (W/3x)
x = ( W * 3x ) / W
so W gets canceled off and now you are remained with 3x which is our answer, D.

28)


29)
W = VQ

35)
Whats wrong ??? Its C only

36)
Ground to plate obviously...
and | -V/d | = V/d = D

 

[ashcull14]

wh

That's the wrong answer

ss the ans is it A...wteva////same formula is used....jst look at the height of the column and apply it

 

[ashcull14]

along the level ov P qs height is x..look carefully....the column of P is 2x..so 1/2

 

[Thought blocker]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w04_qp_1.pdf

Question 20 please

Suchal helped it

 

[Snowysangel]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s13_qp_12.pdf 23 isn't the area increased by 100 and the force by 10 so won't that make 1/10:1 instead of 10:1?

 

[Thought blocker]

View attachment 45266

K = F / x
K = 12 / 0.06 = 200 N/m

 

[ashcull14]

O

K = F / x
K = 12 / 0.06 = 200 N/m

OOOOOOOOoooo....im in a state of PHD...'phira hua dimagh'

 

[Thought blocker]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s13_qp_12.pdf 23 isn't the area increased by 100 and the force by 10 so won't that make 1/10:1 instead of 10:1?

 

[Thought blocker]

O

OOOOOOOOoooo....im in a state of PHD...'phira hua dimagh'

I can see it

 

[Rockstar RK]

Use the concept of relative speed of approach = relative speed of separation

To pan nathi thatu
Hahahahhahaha got it

 

[Thought blocker]

Everything solved ?

 

[Thought blocker]

To pan nathi thatu

ok mane time app... hu lakhine moklu..

 

[danial 234]

but why dd u divide 12 by 0.06..why not 8/0.06

if you want to use 8 , then you would have to use 0.04 ...
simply, you just find the gradient but before that convert the units

 

[Rockstar RK]

To pan nathi thatu

ok mane time app... hu lakhine moklu..

Dont waste time i did it

 

[Thought blocker]

Dont waste time i did it

Ok

 

[Laila39]

A laser emits light of wavelength 600 nm.
What is the distance, expressed as a number of wavelengths, travelled by the light in one second?
A - 5 × 10^8
B 5 × 10^11
C 5 × 10^14
D 5 × 10^17
How do I solve this? What formula is being applied. :/