Direction Definition and 999 Threads

One Direction, often shortened to 1D, are an English-Irish pop boy band formed in London, England in 2010. The group are composed of Niall Horan, Liam Payne, Harry Styles and Louis Tomlinson; former member Zayn Malik departed from the group in March 2015. The group signed with Simon Cowell's record label Syco Records after forming and finishing third in the seventh series of the British televised singing competition The X Factor in 2010.
Propelled to global success by social media, One Direction's five albums, Up All Night (2011), Take Me Home (2012), Midnight Memories (2013), Four (2014), and Made in the A.M. (2015), topped charts in most major markets, and generated hit singles including "What Makes You Beautiful" (their first number one on the UK Singles Chart, and the highest debut for a British act on the US Billboard Hot 100 since 1998), "Live While We're Young", "Best Song Ever", "Story of My Life" and "Drag Me Down". After the release of Four, One Direction became the first band in the US Billboard 200 history to have their first four albums debut at number one. Their third album, Midnight Memories, was the best-selling album worldwide of 2013.Considered teen idols, One Direction were often subject to fan hysteria. They embarked on four world tours, two of which were all-stadium. The band's Where We Are Tour, in support of Midnight Memories, was the highest-grossing concert tour in 2014, the highest-grossing tour by a vocal group in history, and the 15th highest-grossing concert tour of all time, grossing $290.2 million (unadjusted for inflation). The band went on hiatus in January 2016, allowing all members to pursue other projects.As of 2020, the band have sold a total of 70 million records worldwide, making them one of the best-selling boy bands of all time. The band have won nearly 200 awards, including seven Brit Awards, four MTV Video Music Awards, six Billboard Music Awards, seven American Music Awards (including Artist of the Year in 2014 and 2015), and 28 Teen Choice Awards. In 2013, they earned an estimated $75 million, becoming the second highest earning celebrity under 30 according to Forbes. As the world's best-selling artist of 2013, the group was named the Global Recording Artist of the Year by the International Federation of the Phonographic Industry. In 2014, Billboard named the band "Artist of the Year". Forbes ranked them as the fourth highest-earning celebrities in the world in 2015, and second in 2016.

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  1. a_helal

    If i have no velocity in one direction then there is no

    if i have no velocity in one direction then there is no acceleration ? i deal with acceleration for sphere in fluid so i use spherical polar co ordinates (ρ,θ,Φ) i have no velocity in Φ then there is no acceleration in Φ direction ? i want to be sure
  2. SadPanda6022

    What is the magnitude and direction of resulting force with given values?

    I attached problem. I got F1 = 2.7x10-8 and F2 = 8.3x10-9 sqrt(f1^2 +f2^2) = 2.818x10^-8 theta was inverse tan of f1/f2. got 72.8 please help :(
  3. A

    Calculating particle velocity along crystal direction

    I am currently looking at setting up a particle, with energy 5keV, traveling along the [11bar2 0] direction in Zr but I am struggling to get my head around how to resolve the velocity into the 3 directions to make sure it travels along this specific crystal direction. Could anyone help point...
  4. nmsurobert

    What is the direction of the Coriolis force in various scenarios at the equator?

    Homework Statement 4) Find the direction does the Coriolis force in the following case a) a jet going north over the equator; b) a rocket going up at the equator; c) a pendulum at the equator viewed from above (please give the rotational direction.) d) a rocket going up at the south pole...
  5. J

    Direction of Kinetic Friction and Static Friction

    Can someone please explain me the direction of static friction? I know kinetic friction is always going against the motion of an object but for static friction it depends.
  6. W

    Moment Direction: 560sin30 (0.25) Explained

    Homework Statement why the moment 560sin30 (0.25) isn't in clockwise direction ? the horizontal component of the 560N force is directed to the left , causing the moment in clockwise direction, am i right ? I have made my sketch beside in the diagram ... Homework EquationsThe Attempt at a Solution
  7. gracy

    Electric field direction from high V to lower V

    http://postimg.org/image/we3bnkyqn/ I know electric field points in direction in which the potential is decreasing. How does potential decrease in that direction? Here is what I think potential at point a is 10v and at point b it is 20v and direction of E points from b to a,hence electric field...
  8. G

    Anticlockwise Moment & Force Direction: Why the Change?

    Homework Statement in figure b , based on the direction of moment of anticlockwise is positive , i can say that -Tcos20 (7 sin 30 ) is a clockwise moment , so that the tension of rope should be acted in upward direction , so that the horizontal component of the force acted to the left to...
  9. W

    Direction of reaction of a roller

    Homework Statement for no 4 , why the reaction force also act downwards ? as far as i know roller can only support the surface perpendicular to it upwards ... but not downwards... for no 5 , why the recation force acts upward only ? why not also downards?Homework EquationsThe Attempt at a Solution
  10. P

    How to derive the velocity's direction from a potential

    Hi, I need some help with a problem in my Classical Mechanics undergrad course. We were assigned a problem in which we were given a one dimentional potential (some sort of a parabola). We were asked to determine the velocity's direction at different point, and even though it is somewhat...
  11. W

    Direction of tension of metal rod

    Homework Statement the metal rod is supported by another metal rod at one end . The metal rod is supported by another metal rod at the end. so , the direction of tension of metal rod is acted upward , right ?( this is the initial prediction) But , i was told that the tension that we get from...
  12. W

    Direction of reaction of a support

    Homework Statement why the recation of the force is acted to the right ? why not to the left ? how to determine it ? Homework EquationsThe Attempt at a Solution
  13. Sollicitans

    Direction of pressure on a multiple liquid manometer

    Homework Statement Homework Equations P=ρgh The Attempt at a Solution I already have the solution. My question is simple. I can't understand how I define the direction of pressure in each "changing" point. I also have the solution if needed.
  14. W

    Which Diagram Represents Concurrent Forces?

    Homework Statement Which is the correct diagram for concurrent forces? The left or the right one ? Homework EquationsThe Attempt at a Solution
  15. W

    Direction of Tension on Metal Rod by Cable

    Homework Statement Let's say the metal rod is held by a cable and supported by a pin at the bottom, the reaction of thr cable is acted downwards... Why? Homework EquationsThe Attempt at a Solution
  16. A

    Magnitude and direction of acceleration

    Homework Statement A car with a mass of 1.3x10^4kg is initially moving at 35 km/hr in a straight line when the car comes to a complete stop at 15m. What is the magnitude and direction of acceleration?b) the magnitude and direction of the breaking force c) thetime required to stop Homework...
  17. W

    Direction of Tension: How to Determine & Why Downward?

    Homework Statement how to determine the direction of tension ? why it acted in downward direction ? wy not in upward direction ? Homework EquationsThe Attempt at a Solution
  18. W

    Direction of Tension: FBD Down vs Up

    Homework Statement why i figure b , the direction of FBD is in downward direction , whereas in a , its in upward directon Homework EquationsThe Attempt at a Solution
  19. G

    Wind Turbine, wind direction, air direction, drag direction?

    In the aeroplanes, the drag is in the opposite way of the direction of the aeroplane. My questions for wind turbine: 1) Why "wind speed" and "the drag on the blade" is in the same direction? Shouldn't be the opposite? 2) Are freestream velocity and the wind speed same thing? 3) Are the drag...
  20. G

    Direction of resultant force from a point

    Homework Statement I managed to get Fy = 900N , Fx = 200N and FR= 922N , how to get the distance from A is 3.56m ? tetha= arc tan (922/200) = 77.5 degree Homework EquationsThe Attempt at a Solution
  21. W

    Is the Angle Between Vector A and Ax Less Than 90 Degrees When Alpha Exceeds 90?

    Homework Statement if the alpha is larger than 90 degree ( which means the resultant F is lean towards -x axis , then the angle between the Ax and the line from Ax to A will be less than 90 , am i right ? Homework EquationsThe Attempt at a Solution
  22. M

    Direction of particles after decay w/ relativity

    One of the possible decay modes of the neutral kaon is ## K^0 \rightarrow \pi^+ + \pi^- ## The rest masses of the K0 and pion are 498 MeV/c2 and 135 MeV/c2, respectively. In 2-dimensions (xz-plane), if the kaon has an initial momentum of 2000 MeV/c in the z direction, what is the momentum of...
  23. J

    Understanding photon direction

    I have been trying to better understand the concept of a photon (I know...a thousand threads on this alone) and the direction that it propagates. I understand the time-varying field explanation for em waves, but here is where I break down. If an electric field extends in all directions...
  24. L

    Friction Direction in lever with drum

    Hi guys, I trying to understand one thing that I don't know where came from. To visualize the problem I will used the drawings from book. The question is for direction of Force Fb on drawing (b) and (a). I was always learned that friction is acting on direct opposite to motion. In drawing...
  25. Gian Lukmana

    Statics : Direction of Moments

    I still don't really get the concept of moments.. if moment is what makes things rotate, imagine this : ....... F (pushing down the stick) ===================(stick) A so : 1. the stick will rotate in a clockwise direction, 2. but the direction of the moment is negative Z.. (right hand rule)...
  26. dodonaomik

    Px in horizontal direction (about fluid mechanics)

    1. Plot Px in horizontal direction about three quarters of cylndrical surface ABCD Px: horizontal force in unit length 2. formula: P=ρgh3. my question: ①Why does Px point at the right? ③What does the blank mean? Because ABCD is only 3/4 of a circle...
  27. S

    Exploring the Direction of Synchrotron Radiation in Radio Astronomy

    I read in radio astronomy book that radiation from high-energy electrons radiating synchrotron emision, is concentrated in the direction of its instantaneous motion. So if we see them, their orbital motion plane contains us(as observer). I am wondering if they have spiral motion in the related...
  28. D

    Electric field inside and around a hollow sphere

    Hi everyone, I am wondering if anybody could help me out. For my study I got the following question but I got stuck in part C (see image below). I Found at A that due to symmetry all components which are not in Ar direction will get canceled out I found at B that there is only charge density at...
  29. Calpalned

    Dipole magnitude and direction (21.67)

    Homework Statement Homework Equations Total electric field = Electric field caused by Q_1 + electric field caused by Q_2 ##\vec{e} = \vec{e_1}+\vec{e_2}## Dipole moment = ##P = Ql## The Attempt at a Solution **For Part A** ##\vec{E} = \vec{E_1}+\vec{E_2}## The charges are opposite so it...
  30. Calpalned

    Calculate the direction of the electric field (21.34)

    Homework Statement Calculate the direction of the electric field. There are four charges, each is at the corner of a square. One of the charges is -39 and the others are -27.7. Homework Equations The Attempt at a Solution I already got the right answer, but I don't understand the wording...
  31. M

    Why Does Car A Appear to Travel Southeast from Car B's Perspective?

    Homework Statement The drawing shows two cars traveling in different directions with different speeds. Their velocities are: vAG = velocity of car A relative to the Ground = 27.0 m/s, due east vBG = velocity of car B relative to the Ground = 21.0 m/s, due north The driver of car B looks out...
  32. F

    Finding direction of net force and direction of travel

    Homework Statement A 0.35 kg particle moves in an xy plane according to x(t) = - 11 + 1 t - 6 t3 and y(t) = 19 + 3 t - 8 t2, with x and y in meters and t in seconds. At t = 0.7 s, what are (a) the magnitude and (b) the angle (within (-180°, 180°] interval relative to the positive direction of...
  33. mia_material_x1

    Motion in One Direction: Particle Velocity, Acceleration, and Position

    Homework Statement A particle is moving along the x axis. Its velocity as a function of time is given by v = 5+10t , where v is in m/s. The position of the particle at t = 0 sec is 20 m. Find (a) the acceleration as a function of time (b)the position as a function of time (c) the velocity of...
  34. G

    Direction of Moment: 1200N at A- Clockwise or Counterclockwise?

    Homework Statement Why shouldn't the direction of moment for 1200n at A =clockwise? Why the book gave counterclockwise? Homework EquationsThe Attempt at a Solution
  35. G

    Direction of rotation of moment

    Homework Statement IMO , the M2 and M1 should rotate clockwise, and the moment should point downwards based on right hand grip rule . Why the book gave in in other way ? Homework EquationsThe Attempt at a Solution
  36. G

    Direction of rotation of moment

    Homework Statement for the 400cos45 force , i think it should rotate anticlockwise, am i right? but the book gave it is rotated counterclockwise... Homework EquationsThe Attempt at a Solution
  37. G

    Direction of Moment: Is Book Correct?

    Homework Statement IMO, the direction of moment of both F1 and F2 should point inside the paper , and rotate clockwise , am i right ? but the book gave different things... which is correct? Homework EquationsThe Attempt at a Solution
  38. N

    2 Questions about motion in 1 direction

    So I have 2 questions to answer for my physics class and I'm not quite sure what to do. Here are the two questions and I was wondering if someone could possibly point me in the right direction. I'm not asking for the answers I just kind of want a rough idea of where to start. Thank you 1. An...
  39. S

    Speed and direction of a travelling wave

    Homework Statement \Psi(y,t)=A\cos^22\pi(t-y) Show that this is a traveling wave. Use the general form of a traveling wave to determine its speed and direction. Verify your answer using \frac{-\partial \Psi / \partial t}{\partial \Psi / \partial x} Homework Equations The general form of a...
  40. S

    The direction of a magnetic field?

    my questions are rather simple and stupid and i won't delve into theory like the last times how do we know the magnetic field lines are pointing inward on south and outward on north instead of inward on north and outward on south? or for this rule it's really the same question, how do we...
  41. moenste

    Mechanics. Vectors. Find magnitude and direction of forces

    Homework Statement Find the magnitude and direction of the resultant of the following pair of forces: 60 N at 150 degrees to 20 N Answer: 43.8 N at 136.7 degrees to 20 N and 13.3 degrees to 60 N Homework Equations Cosine and sine rules: R2 = a2 + b2 - 2 * a * b * cos A a / sin A = b / sin b =...
  42. bcrowell

    Direction of E field transforms like direction of a stick

    A while back ( https://www.physicsforums.com/threads/direction-of-field-line-transforms-like-direction-of-a-stick.730373/ ), I posted a discussion here of the following seemingly mysterious relationship between two transformation rules: (1) If a field is purely electric in a particular frame...
  43. Fluxxx

    Direction of magnetic field and force in current wires

    I read this example in a book and I'm thinking about what is the "determining factor" of the directions of the magnetic field vector B and the magnetic force vectors F. If we start by looking at wire 1 in picture (a), if we only know the direction of the current (we call this "v"), can we...
  44. G

    Understanding Moment Vectors and Positive Rotation Direction

    Homework Statement Assuming positive x direction is counterclockwise, then why would the force 50n and 40n are turned clockwise ? (they have negative value) Homework EquationsThe Attempt at a Solution
  45. R

    Calculating Direction Cosines for Linear Equations - Homework Help

    Homework Statement To find the direction cosine of a equation say (4x+5y+7z=13) Homework Equations Im not really sure what to do The Attempt at a Solution (I know this is really basic but i would be glad if someone helps me with this
  46. G

    Direction of cartesian equation

    Homework Statement In this question, I didn't see why the given 90 degree is 90 degree becoz it doesn't look like 90 degree. Can someone draw me a better diagram? It's hard to visualize it's 90 degree Homework EquationsThe Attempt at a Solution
  47. gracy

    Understanding Torque: Magnitude and Direction

    As we know all vectors with the same magnitude and direction are equal despite their different locations.so we can move the force vector such that Now how will it produce torque?Please tell me where am i getting wrong?
  48. M

    Direction and Average Acceleration

    You and your little brother are rolling toy cars back and forth to each other across the floor. He is sitting at x = 0, and you are at x = 4.0 m. You roll a car toward him, giving it an initial speed of 2.2 m/s . It stops just as it reaches him in 3.0 s. In what direction is the car's...
  49. P

    Using relative motion to find direction and time of a boat

    Homework Statement A motorboat can move with a velocity of 10.0 m/s, with respect to the water in a river. The river is flowing at 4.00 m/s due east. (a) Calculate the direction (Give the angle with respect to one of the compass directions.) the motorboat must be pointed so that it moves due...
  50. T

    How Do You Determine George's Direction Relative to John in a Strawberry Field?

    Homework Statement John, Paul, and George are standing in a strawberry field. Paul is 16.0 m due west of John. George is 40.0 m from Paul, in a direction 39.0 ∘south of east from Paul's location. A. How far is George from John? (Already Done) B. What is the direction of George's location...
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