AravindG
  • AravindG
doubts on gravitation,mechanical properties etc
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
AravindG
  • AravindG
HI THX FOR CMING ...i hav many doubts so pls stay k?
TuringTest
  • TuringTest
Sure, I'll try
AravindG
  • AravindG
wow thx

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AravindG
  • AravindG
xplain tangential acceleration and radial acceleration .how to find net acceleration?when are the cases when they become 0 alternatively?
AravindG
  • AravindG
turing?
TuringTest
  • TuringTest
|dw:1329408300806:dw|the terms are not quite what I'm used to, but radial acceleration is a result of the change in direction of the object:\[a=\frac{v^2}r\]it is because the motion vector changes that we get this acceleration (change in direction always means acceleration is happening) so if the object is moving in a straight line the radial acceleration (I call it centripetal acceleration) is zero
TuringTest
  • TuringTest
this illustrate that the change in direction causes an acceleration because the velocity vector changes|dw:1329408593274:dw|As for tangential acceleration that is a result of the object speeding up or slowing down linearly. if, say, we have an object moving in a circular path we have\[a=\alpha r\]where alpha is the angular acceleration:\[\alpha=\frac{d\omega}{dt}\]So if the angular velocity is changing, the object is experiencing a tangential acceleration.
AravindG
  • AravindG
k
AravindG
  • AravindG
so radiall acc does not contribute to change in angular velocity?
AravindG
  • AravindG
doubt 2:when an apple falls towards earth the earth moves up to meet the apple .is this true xplain?
TuringTest
  • TuringTest
no radial acceleration happens just by virtue of the object turning, tangential means the object is actually speeding up along the direction of motion (circle, line, whatever) Last question: Yes this is true, because the all forces come in action-reaction pairs. Because the earth exerts a force (gravity) on the apple, the apple exerts a gravity force on the earth. The magnitudes of those forces are the same, therefor the earth doesn't move much, but it must theoretically move some.
AravindG
  • AravindG
hey why does earth move less?
TuringTest
  • TuringTest
because it is more massive, and\[F=ma\]m of the apple is small, and m of the earth is large, so the same force on the apple and earth will cause a much greater acceleration on the smaller mass (the apple) than the earth
AravindG
  • AravindG
k so a body in uniform circular motion has 0 tangential acceleration?
TuringTest
  • TuringTest
right
AravindG
  • AravindG
do u know applications of modulus of elasticity?
TuringTest
  • TuringTest
if v1=v2 from one point to the next we have 0 change in tangential velocity, which is tangential acceleration of 0|dw:1329409969038:dw|
TuringTest
  • TuringTest
mmm... I never really studied that stuff much. which modulus are we talking about, young's?
AravindG
  • AravindG
ya
AravindG
  • AravindG
turing?
AravindG
  • AravindG
|dw:1327595834758:dw|
AravindG
  • AravindG
beam of girder is I shape why?
AravindG
  • AravindG
srry or girder
TuringTest
  • TuringTest
hmm... not sure I can answer that effectively
AravindG
  • AravindG
what does product of speed and area give us?
TuringTest
  • TuringTest
not sure I understand what you mean
TuringTest
  • TuringTest
area of what?
AravindG
  • AravindG
area of crossection of a tube
AravindG
  • AravindG
and speed of water thriugh it
ash2326
  • ash2326
Volume of water /second
TuringTest
  • TuringTest
well area times velocity is a constant for an incompressible fluid like water, so when the tube narrows the speed of the water increases. I'm pretty sure they multiply to unit volume passing though the area in question
TuringTest
  • TuringTest
^oh good, I'm right
AravindG
  • AravindG
ya hw u got that?
ash2326
  • ash2326
Speed= distance/ time Area*distance/time Volume/time
TuringTest
  • TuringTest
...or just looking at units\[v\times A=\frac ms\cdot m^2=\frac{m^3}{s}\]which at least suggests it's volume over time
AravindG
  • AravindG
k
AravindG
  • AravindG
hey turing hw long will u be here?
AravindG
  • AravindG
(Also ash)
AravindG
  • AravindG
:P
ash2326
  • ash2326
Aravind won't be able to help you with rotation:( I've completely forgotten about it
TuringTest
  • TuringTest
Mexican holiday today, but I still gotta eat breakfast :P
AravindG
  • AravindG
i dont need rotation help k i hav some other doubts
AravindG
  • AravindG
hey turing tell time
ash2326
  • ash2326
I'll be here for 5 minutes more, have to study
AravindG
  • AravindG
:P
AravindG
  • AravindG
me 2 thats y i enquired
TuringTest
  • TuringTest
I'll be here until I get hungry!
AravindG
  • AravindG
u see i get a lot of doubts wen i study
AravindG
  • AravindG
i want to make sure smone will be here to help me
AravindG
  • AravindG
u see i hav imp exams
ash2326
  • ash2326
Aravind preparing for JEE?
AravindG
  • AravindG
yes
AravindG
  • AravindG
nic guess
ash2326
  • ash2326
I will get my brother to help you some time, he knows much more than me
AravindG
  • AravindG
so turing can i cm online after smtime with a bunch of doubts pls be here :P
AravindG
  • AravindG
@ash wow where is he studying ??iwhats his name?>
TuringTest
  • TuringTest
yeah, most likely in an hour or two is good
ash2326
  • ash2326
He's in IIT Bombay, his name is suyash
AravindG
  • AravindG
k thx pal i wanna be the topper in the xam pray for me and help me k?
AravindG
  • AravindG
wow is he there in openstudy?
ash2326
  • ash2326
ok, i'll surely. He's there but comes very less
AravindG
  • AravindG
k can u tell him ...its my biggest aim to reach iit pls tell him to come ...i would be glad if he is willing to use skype :P
AravindG
  • AravindG
ash?
ash2326
  • ash2326
Aravind G, he can't use skype, he doesn't have laptop but I'll ask him to come. And I'll also try to help you out. You can find me more here

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