Edexcel PHYSICS Doubts

[astarmathsandphysics]

cant find 17 c iv

[astarmathsandphysics]

9 is A and so does ms say

[The Golden Girl =D]

I don't get 8 and 2 and please answer the rest of the Questions  Q.14   .. Q.17]c)iv)   :$

[The Golden Girl =D]

sorry I meant Q.18]c)iv)

[astarmathsandphysics]

charge momentum and energy are conserved in all processes.

[The Golden Girl =D]

can you please re-explain Q.8 , 2 and give me at least an idea of how to do Q.14 ?

[astarmathsandphysics]

for q 14 you have to find the gradient=(y2-y1)/(x2-x1) and put it equal to -u

[astarmathsandphysics]

what is Q.8 , 2

[The Golden Girl =D]

you explained Q.2 and 8 which are in Section A but I'd appreciate it if you elaborated a bit :$

Q.14 sir is about the electric fields and the carbon coated ball , it's in Section B.

[The Golden Girl =D]

Sir please =$

[The Golden Girl =D]

I'll check this in 15 minutes inshAllah =]

Be right back

[astarmathsandphysics]

ok one mo

[astarmathsandphysics]

Q2 is impossible for me to show you without being there cos the left hand rule is something you have to see.
Q8 is B cos the mass increases with speed so if the mass is much larger than the mass it has when it is moving, it must be moving at relativistic speed 9close to the speed of light)

[The Golden Girl =D]

Sir there is Question 14 left ... and then I'll disappear into thin air =]

[astarmathsandphysics]

14. Between the plates the field E is constant so the force on the charged ball is F=Eq and acceleration is a=F/m=Eq/m also constant (so v is a straight line). When the ball its a plate is is charged with opposite sign so is repelled from plates but as before, acceleration constant so graph os speed against time is straight line for time between the plates.