Post a New Question

physics (geometry bit)

posted by .

Thanks for the help guys!!!
I really appreciate it!!!

ok I drew the thing as caerfully as I good

h t t p : / / i m g 3 7 . i m a g e s h a c k . u s / i m g 3 7 / 7 8 0 7 / f i r s t d w s . j p g

ok I redrew it chekc it

Ok I followed the directions and made a line through the point of the force of gravity parallel to the slope of the ramp...

walla I noticed a theta that I thought the triangle was and thought it was equal to the angle the ramp makes with the surface it sits on as it would appear to be but I don't know how to prove it...

ok the problem with this triangle is...

well the hypotenuse is the force of gravity which it is suppose to be

but the opposite side is y component of the force of gravity is the opposite of this triangle when it's suppose to be the adjacent...

sigh I still don't see the other triangle were the hypotenuse is the force of gravity with the opposite is the is the x component of the force of gravity

THANKS!!!

  • physics (geometry bit) -

    You still don't have it exactly. The angle equal to theta(ramp) is the other angle in the triangle in bold, at the top.

    http://www.angelfire.com/stars/dhsphysics/friction.jpg

    How to prove this? Similar triangles. Notice the upper angle in that photo is a right angle (ramp to Fn), in which the angle of Fn to the vertical is an angle complement to Fp and the vertical. Well, the ramp angle is also a complement to that angle. Therefore, ramp angle = angle Fn to vertical.

  • physics (geometry bit) -

    your image didn't work

  • physics (geometry bit) -

    link didn't got to image

  • physics (geometry bit) -

    It goes there for me.

  • physics (geometry bit) -

    not for me =[

    look...

    h t t p : / /i m g1 3 2 . i ma g e s h a c k. u s / i m g1 3 2 / 9 1 3 7 /c a p tu r e t q i. j p g

    could you try image shack upload (link below) I don't know why it wouldn't let me see it i captured the screen when i clicked on the link it's the link above

    h t t p : / / i m a g e s h a c k . u s /

    =]

  • physics (geometry bit) -

    when i click on your link it bring me here

    h t t p : / / ww w . a n g e l f i r e . l yc o s . c o m / d o c / im ag e s / r l o a d b l oc k . j p g

    i noticed a different adress then the link

  • physics (geometry bit) -

    ha ha i copied the lnik instead of clicking on it i got it thanks

  • physics (geometry bit) -

    what's fw and Fp

  • physics (geometry bit) -

    ohh ok um

    Fw is the gravity

    and Fp is the x component

    and

    Fn is the y component???

    how come the x component is drawn in a weired location

    but we got the triangle now thanks!!!

  • physics (geometry bit) -

    How to prove this? Similar triangles.

    Notice the upper angle in that photo is a right angle (ramp to Fn),

    yes and i agree right anlge

    in which the angle of Fn to the vertical is an angle complement to Fp and the vertical.

    ok so your saying that...
    angle Fn Fw

    is complement to angle
    fp and fw

    because triangle adds up to 180 degrees ok understand

    Well, the ramp angle is also a complement to that angle.

    huh so angle of the ramp is complemtary to angle Fw Fp...

    ok i can visually see that but how do we now these two angles are complementary???

    Therefore, ramp angle = angle Fn to vertical.

    I agree... now snese both angles are completary to this other angle then they must be equal

    THANKS!!!

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. geometry

    Hi! I have a Geometry worksheet I need to get done for tomorrow. It's a really easy thing, I guess...but I'm a bit stuck. The measure of an angle is six more than twice the measure of its supplement. Find the measure of the angle. …
  2. electronics

    pls help me guys... 1.) what is the function of cathode?
  3. Physics (Geometry bit)

    ok i got my diagram posted question earlier it wouldn't let me post anymore I'm really sorry guys just trying to get my diagram to work =[ ++++++++++++++++++++++++++++++ ++++++++++++++++++,++++++++++/|\ +++++++++++++++++++++++++++++| …
  4. physics (geography bit)

    Thanks for the help guys!!! I really appreciate it!!! ok I drew the thing as caerfully as I good h t t p : / / i m g 3 7 . i m a g e s h a c k . u s / i m g 3 7 / 7 8 0 7 / f i r s t d w s . j p g ok I redrew it chekc it Ok I followed …
  5. Cal

    Find the volume of the solid formed by rotating the region enclosed by y=(e^(2x))+4,y=0,x-0,x=0.4. I tried doing this but got really confused. Really appreciate it if you guys help.Tnks
  6. physics

    hey you guys , i reay appreciate it if you guys help me out . Q: a vector is a physica quantity that has which of the following properties ( can be more than one) a)magnitude b)color c)speed d)direction
  7. One last math question

    umm yea... I tried solving it but I couldn't do it [18 * (1/2 - 1/9) + 9 / (2/3 - 1/6)] / 2.5 thanks for your help guys i really appreciate it
  8. Thank Jiskha tutors

    I really appreciate all that you tutors do for us, I know we may be a bit demanding sometimes XD but we really love how you guys are always there to help us out. Coming from experience, I've had some past teachers that aren't as willing …
  9. History

    Hi ! Can someone give me some really really really good websites about the "Manhattan Project" (WWI/WWII).. you know.. I need ONE primary resource and ONE secondary resource. I know you guys are really good at giving good websites. …
  10. science (theory of evolution)

    1.What is two pieces of evidence used to support theory of evolution?

More Similar Questions

Post a New Question