Physics: Post your doubts here!

usama321

usama321

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sma786 said:
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s07_ms_2.pdf

2 (d) please :(
Click to expand...
Particle has no vertical velocity initially. We also know that when a force is perpendicular to the direction of motion, the acceleration produced does not affect the velocity of the object, rather just changes its direction.

From the previous part we know that the time the particle takes to move a horizontal distance of 12 cm. Use that time, and use s = 1/2 a t^2 (no initial vertical speed of particle so ut = 0)
It gives us s = .71cm. Thus the particle only travels .71cm vertically. As it is moving through the middle of the plates, the minimum vertical distance it has to travel to collide with the plate is .75cm. Thus, it doesn't collide with the plate.
 
sma786

sma786

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usama321 said:
Particle has no vertical velocity initially. We also know that when a force is perpendicular to the direction of motion, the acceleration produced does not affect the velocity of the object, rather just changes its direction.

From the previous part we know that the time the particle takes to move a horizontal distance of 12 cm. Use that time, and use s = 1/2 a t^2 (no initial vertical speed of particle so ut = 0)
It gives us s = .71cm. Thus the particle only travels .71cm vertically. As it is moving through the middle of the plates, the minimum vertical distance it has to travel to collide with the plate is .75cm. Thus, it doesn't collide with the plate.
Click to expand...
Okay got it! Thankyou so very much :LOL::love:
 
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Mohammed salik

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sma786

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Mohammed salik said:
I would give You detailed Explaination now...

P=Pressure, A=Area, F=Force,D=Density,V=Volume,M=Mass, g=Gravity,H=Height

P=F/A
M=D*V
W=M*G
W=D*V*g V=AH
W=D*A*H*g
W=F
P=F/A SO D*A*H**g/A
H cancel out to give
P=D*g*h!

Hope u Do understand! if not Then i would write down and Explain!! :) ;)
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Thankyou :love::love:
I understood it very well (y)
 
axetreme.O

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misaki ayuzawa

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Ok...i hav recently strted phy p4...
nd i hate phy...i usually get lame lame doubts from phy...so i hope u dnt get annoyed when u see my doubts :p
ques: May-June 2009 phy p4
Que 1.part b
for da diameter we shud divide it by 2...nd find da mass
but i dnt get my ans...
plzzz any1 solve it...
P.S. I nid it ASAP :D
 
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