Physics: Post your doubts here!

[Sinzzzz]

heyy! could someone please explain the following questions:
9702/11/O/N/11 questions 24 and 26
thanks!

 

[princess Anu]

SEE 267 at
http://physics-ref.blogspot.com/2015/01/physics-9702-doubts-help-page-44.html

can u send me the link for this

 

[princess Anu]

ans is D
can somebody post its solution pleaseee

 

[Ahmed Aqdam]

View attachment 54341 ans is D
can somebody post its solution pleaseee

What year is this from?
This is related to A2.
Apply the formula F=QQ/4Pi*E*r^2

 

[princess Anu]

What year is this from?
This is related to A2.
Apply the formula F=QQ/4Pi*E*r^2

oh lol.It is from an old paper.

Can u solve the other one too please

 

[Ahmed Aqdam]

oh lol.It is from an old paper.

Can u solve the other one too please

What is its ans?
And are you sure velocity before collision isn't mentioned?

 

[princess Anu]

yeah.& It's B

What is its ans?
And are you sure velocity before collision isn't mentioned?

 

[Zirik khan]

Can't understand the question in physics p1 m/j 13 p13 Q#11

 

[asadalam]

Can't understand the question in physics p1 m/j 13 p13 Q#11

In elastic collision relative speed of approach is relative speed of separation
B: 3-(-3) = 6-0
C: 3-(-2) = 6-1
D: 5-2 = 6-3
A 2-(-5) =/= -5-(-2)

hence A is inelastic.

 

[Ahmed Aqdam]

yeah.& It's B

Resolve momentum in x and y directions.
Resolving in x will lead to two variables, initial velocity and mass of the second puck so this will be resolved in y direction.
0=0.3*0.2sin30-m*0.15sin45
Solve to get m=0.28 kg

 

[69ermalik007]

can somebody help explain these question....

 

[Turki AbdulAziz]

Q.P http://maxpapers.com/wp-content/uploads/2012/11/9702_s14_qp_11.pdf
M.S http://maxpapers.com/wp-content/uploads/2012/11/9702_s14_ms_11.pdf
Can someone please help with question 33?
Why cant we say R is much greater than R(A) ??

 

[Zirik khan]

Thnx

In elastic collision relative speed of approach is relative speed of separation
B: 3-(-3) = 6-0
C: 3-(-2) = 6-1
D: 5-2 = 6-3
A 2-(-5) =/= -5-(-2)

hence A is inelastic.

 

[nehaoscar]

Why B?
The height of water in both would be h/2 right?
So then lost gpe = mgh/2

So how is it mgh/4 ??

 

[bubbles1997]

Hi All! Please help us in tomorrow's chemistry practical.
Feel free to post anything related.
https://www.xtremepapers.com/community/threads/as-chemistry-2015-m-j.41585/

 

[princess Anu]

How to do this? ans is C

 

[nehaoscar]

see solution 64 at
http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-12.html

But then when calculating center of gravity normally, you don't consider the center of mass right?
So why is it considered in water?
And should I consider center of gravity when calculating gpe for all fluids?

 

[nehaoscar]

How D?

 

[nehaoscar]

Why not D?

 

[nehaoscar]

How D?