What is Balls: Definition and 555 Discussions

Edward Michael Balls (born 25 February 1967) is a British broadcaster, writer, economist, professor and former politician who served as Shadow Chancellor of the Exchequer from 2011 to 2015. A member of the Labour Party and Co-operative Party, he was Member of Parliament (MP) for Morley and Outwood, formerly Normanton, from 2005 to 2015.
Balls attended Nottingham High School before studying philosophy, politics and economics at Keble College, Oxford, and was later a Kennedy Scholar in economics at the John F. Kennedy School of Government, Harvard University. He was a teaching fellow at Harvard from 1988 to 1990, when he joined the Financial Times as the lead economic writer. Balls had joined the Labour Party whilst attending Nottingham High School, and became an adviser to Shadow Chancellor Gordon Brown in 1994, continuing in this role after Labour won the 1997 general election, and eventually becoming the Chief Economic Advisor to the Treasury.
At the 2005 general election, Balls was elected as the MP for Normanton (which in 2010 became Morley and Outwood), and in 2006 became Economic Secretary to the Treasury. When Brown became Prime Minister in 2007, Balls became Secretary of State for Children, Schools and Families, serving until the 2010 general election; Labour were at that point defeated after thirteen years in government, and returned to Opposition. He was appointed as Shadow Secretary of State for Education under Harriet Harman and finished in third place at the 2010 Labour leadership election, triggered by Gordon Brown's resignation as Leader of the Labour Party, after which he was appointed as Ed Miliband's Shadow Home Secretary. He served in this role until 2011, when he was then appointed as Shadow Chancellor of the Exchequer, a role that he held until he was unseated at the 2015 general election.
Following his electoral defeat, he became a senior fellow at Harvard University Kennedy School's Mossavar-Rahmani Center for Business and Government, and a visiting professor to the Policy Institute at King's College London. He was appointed chairman of Norwich City F.C. in December 2015, a position he held until December 2018. In 2020 he was appointed Professor of Political Economy at King's College London. Balls was a contestant on series 14 of the BBC's Strictly Come Dancing, surviving until week 10, and in 2021 was the winner in BBC's Celebrity Best Home Cook.

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  1. Said Ahmad

    Calculating Passing Height of Two Thrown Balls

    Homework Statement Ball A is thrown vertically by speed 40 m/s. After 1 second, Ball B is thrown vertically also by speed 47.5 m/s. What height from ground will they pass each other? ( g = 10m/s2 ) Homework Equations s = vt + ½at2 t = v/g v2 = v02 + 2asThe Attempt at a Solution Time A to...
  2. A

    Collisions Impulse; Balls dropped from same height.

    Homework Statement Two balls with the same mass are dropped from the same height. After colliding with the ground, one of the balls "A" bounces higher than the other ball "B." Neglect air resistance. Is mechanical energy conserved ? Are they subjected to the same impulse after colliding with...
  3. hubot

    Feynman exercise - container with steel balls

    Homework Statement You received many steel balls of the same diameter d and container of known volume V. All dimensions of the container are much greater than balls diameter. How many balls can be placed in a container? Homework Equations (\frac{4}{3}\pi)(\frac{d^3}{8})\approx0,52d^3 The...
  4. wolram

    How many ways can you arrange 128 tennis balls

    http://www.sciencedaily.com/releases/2016/01/160127053413.htm Researchers have solved an apparently overwhelming physics problem involving some truly huge numbers. In summary, the problem asks you to imagine that you have 128 tennis balls, and can arrange them in any way you like. The challenge...
  5. C

    Hausdorff distance between balls

    Homework Statement Hello. Let be n integer and let's considere $$\mathbb{R}^{n} = E$$. Let be the distance $$d : (x; y) \in \mathbb{R}^{2} \rightarrow ||x - y||_{2}$$. We wright $$\forall p \in [1; \infty], B_{p}$$ the unit closed ball for $$||.||_{p}$$. Forall compacts A, B of $$E$$, we...
  6. G

    Newton's cradle: Glue balls together

    Hi. Assuming only one ball is pulled away and let go, it's fairly easy to show that momentum and/or energy conservation would be violated if this made two balls to bounce off on the other side (if the other ones remain still). So what happens if we glue the last to balls together or replace...
  7. A

    Collision of rolling billiard balls

    Homework Statement There are two problems: (A) Consider two identical billiard balls (spheres), each of mass M and radius R. One is stationary (ball 2) and the other rolls on a horizontal surface without slipping, with a horizontal speed v (ball 1). Assume that all the frictional forces are...
  8. Sunanda Goh

    Why does water or balls spill out ?

    I know, this is a very stupid question, but it troubles me the whole day and i can't figure it out. Why can't water remains its shape if the cup is being removed and the water will spill all over the table ? And if you fill your car with full of small balls and when you open the door of your...
  9. E

    Two balls thrown from bridge one upwards, other downwards?

    I would have thought the force of a persons arm being thrown downwards (with gravity) would essentially increase a balls initial downward acceleration immediately following the balls release. As compared to an upwards thrown balls initial acceleration; in which the persons upwards arm movement...
  10. T

    Why do atoms in a solid act like hard balls?

    Homework Statement Why can we assume that atoms in a solid material act like hard balls? The Attempt at a Solution because they are tightly packed together when in a solid state[/B]
  11. C

    Finding Final Velocities in head-on Collision

    Homework Statement Two balls move toward each other. Ball one is moving in the positive direction, has a mass of m1, and a velocity of v initially. While ball two has a mass of m1/2, is moving in the negative direction, and has initial velocity of v2. Once the collision takes place ball one...
  12. W

    Modified Balls in Boxes ; allowi "negative number of balls"

    Hi all, There is a known formula for the number of solutions to ## x_1+x_2+...+x_k =n ## when ##x_1,x_2,...x_n ##are non-negative Integers. Question: Are there known formulas for the sum ##x_1+x_2+...+x_k =n ## when ## x_1, x_2,..,x_k ## are positive or negative Integers in a bounded...
  13. yango_17

    Charged balls connected by spring

    Homework Statement Consider two small balls with charges +q and -q, connected by a spring with spring constant k. A homogeneous electric field E has been turned on. E is collinear with the line that connects -q to +q. By how much will the string stretch? Homework Equations Coulomb's Law...
  14. P

    Find the buildings height for two balls to land @ same time

    Homework Statement A ball is thrown straight up from the edge of the roof of a building. A second ball is dropped from the roof 1.00s later. A) If the height of the building is 20.0m, what must the initial speed of the first ball be if both are to hit the ground at the same time? B)...
  15. T

    Throwing and dropping two balls: Find height where they meet

    Homework Statement You throw one ball vertically (V0= 15m/s) on top of a 100m tower. Two seconds later you release another ball from rest from the same tower. Create a motion equation for both balls At what moment do they pass each other? At what height? Homework Equations s=vt+1/2at^2 The...
  16. H

    Two balls dropped from the same height

    I have seen youtube videos where two balls of the same size and of different masses are dropped from the same height and they hit the ground at the same time. I understand why this is so: the increase in the mass of a body increases the force of gravity acting on the body, but also decreases...
  17. M

    MHB Find $\frac{a}{b}$ in the Circle of Balls

    How find $\frac{a}{b}$
  18. diracdelta

    4 balls and 4 cells probabillity

    Homework Statement Four balls are distributed randomly and independently into 4 cells. What is probability that: a) In every cell there is exactly one ball? b) All four balls be in one cell? c)Two balls in one cell ( any) , other two balls in other cell (any)? (assume that the balls are...
  19. Drakkith

    Elastic Collision of Two Balls

    Homework Statement [/B] A white billiard ball with mass mw = 1.53 kg is moving directly to the right with a speed of v = 3.25 m/s and collides elastically with a black billiard ball with the same mass mb = 1.53 kg that is initially at rest. The two collide elastically and the white ball ends...
  20. C

    Advanced (Or simple?) balls in a jar probability

    If I have 8 jars, each jar contains 5 unique ball types. However, I know that I have 20 unique ball types out there. So, I have balls labelled from B1, B2, B3, ...B20 to put into 5 jars. Let's say Jar 1 : B1, B3, B4, B7, B12 (5 unique balls) jar 2 : B9, B7, B11, B15, B18 (5 unique balls) jar...
  21. T

    Relative velocities of balls on reaching the ground.

    Here's a physics question that's been giving me trouble. At a height H ,a ball A is thrown upward with a velocity of 20m/s and another B one is thrown down with a velocity of 20m/s and a third ball C is just dropped. Note that it's the same height for all three.I need to find the relation...
  22. S

    Collision question -- 2 balls colliding elastically

    Homework Statement A 2.0 kg ball moving with a speed of 3.0 m/s hits, elastically, an identical stationary ball as shown. If the first ball moves away with angle 30° to the original path, determine the speed of the first ball after the collision. the speed and direction of the second ball...
  23. ChrisVer

    Dragging colored balls off box in succession

    Suppose you have a box with 10 balls, the 4 are red, the 5 are blue and the 1 is white. The probability of dragging each ball is 0.4~,~0.5~,~0.1 respectively. Now if I ask what is the probability of getting 3 balls in the order: red -> blue -> white, what is the right answer if balls are...
  24. Nick666

    Probability to extract balls problem

    My knowledge about this kind of problems is almost zero, so I need some help. I know that if we have 20 balls in a urn, 1 to 20, the probability to extract 1 to 5 in a extraction is 5/20=1/4 But what if we have 4 extractions with the balls extracted put back in the urn? How do I calculate that ?
  25. S

    Electrostatics Basics -- 2 plastic balls hanging on threads attract each other

    Homework Statement Two small plastic balls hang from threads of negligible mass. Each ball has a mass of 0.14 g and a charge of magnitude q. The balls are attracted to each other and the threads attached to the balls make an angle of 20.0 degree. with the vertical. The balls are 2.05 cm apart...
  26. E

    2D Collision of 3 Billiard Balls

    Homework Statement A 500 g billiard ball is going at 10 m/s [E] when it impacts 2 other identical billiard balls. Afterwards, you observe 2 of the balls moving at 2 m/s [30 W of S] and 3 m/s[45 N of E] respectively. Calculate the Energy lost in the collision. Homework Equations KE = 1/2mv^2...
  27. R

    Dropping two balls, one with twice the mass

    Homework Statement Two masses are placed on top of a building. The mass of one is twice the mass of the other. Both are dropped at the same time. Neglecting air resistance, which statements are true? 1. Both objects have the same potential energy at the top 2. Both objects fall with the same...
  28. andyrk

    Number of ways to fill 3 boxes with 5 balls

    What are the number of ways in which 3 different boxes can be filled with 5 different balls so that one box gets 3 balls and the other two get 1 ball each? Each box has the capacity to hold 5 balls at most. The answer to this is 5!/(3!1!1!) x 1/2! x 3! = 60 But when I do it, I think of it this...
  29. K

    Force reactions of balls in a tube

    Homework Statement Two smooth balls of radius 10[cm] and weight 6[kg] are inside a tube of radius 16[cm] that's on the table. what are the reactions from the walls and what is the minimum mass of the tube to be in equilibrium Homework Equations Disassembling of forces using trigonometry The...
  30. J

    Collision of 2 balls on frictionless surface

    Homework Statement I am not asking you to help me solve this, so i won't put in any usefull relevant equations or attempts at a solution. The nature of my problem is more of an understanding this collision - it is more of a thinking thing to process here. The problem goes like this. Ball is...
  31. R

    Two conducting balls hanging from the same point

    Homework Statement In the figure, two conducting balls of identical mass m = 20 g and identical charge q hang from nonconducting threads of length L = 100 cm. If x = 5.9 cm, what is q? Since x is much smaller than L approximate sin(θ) by θ. Homework Equations Tcos theta = mg Tsin theta =...
  32. oreo

    Impulse of Dropped Balls: Higher Heights Explained

    If we drop two balls same heights.One ball reaches higher height after bouncing than other then has that ball experienced larger impulse?
  33. W

    Viable Railgun Setup? (ping pong balls)

    Hello, I'm working on a personal project that requires a very precise, but not very powerful, ping pong ball launcher. Would it be possible to coat a ball in metallic conductive paint, and then fire it from two rails like a railgun? Would I still get a constant net force in the correct...
  34. P

    Solve Spring & Ball Puzzle: Find m1, m2, k & Sm1

    1. You have one platform (1.2m high and 0.12m wide) and a few small balls of a different mass (0.09, 0.14, 0.25, 0.38, 0.57, 0.9 kg) that slide across the platform without friction and you have 4 springs with various stiffness (556, 918, 1110, 1546 N/m, ignore the mass of the spring). You can...
  35. S

    Tipping cylinder tube with balls in it

    Problem Statement Two identical spheres of radius r are placed inside a cylinder of radius R as shown in the diagram below. You are given that R/2 < r < R and that each ball has a weight W. All surfaces are smooth. Show that there is a minimum mass, m, of the cylinder which will allow it to...
  36. J

    Two balls, of masses mA=45g and mB=65g, are suspended

    Homework Statement Two balls, of masses mA=45g and mB=65g, are suspended as shown in figure 9-53. The lighter ball is pulled away to a 66 degree angle with the vertical and released. (a.) What is the velocity of the lighter ball before impact? (b.) What is the velocity of each ball after the...
  37. Ryuzaki

    Probability question involving picking balls from a bag

    I’m working on a chemistry problem, which essentially translates to finding the answer to a related probability problem. However, my knowledge in probability is very limited and I'd be grateful if someone could help me out with it. The following is the problem:- Suppose I have a bag containing...
  38. H

    Inertia of Two Tennis Balls in a Vacuum

    I joined the forum to hope for an answer to a question that has been bugging me for a while. If I hit a tennis ball in a vacuum with no other forces acting upon it and another chap hits a ball from the other end of the court - at the moment the balls cross if you could freeze time what...
  39. S

    Elastic collision of three balls

    Homework Statement The first ball collides with ##v_1## collides with the second two as shown in the picture. All balls are identical and the second balls have no speed at the beginning. Find the transform matrix and find the covariation matrix after the collision if it is ## \begin{bmatrix}...
  40. U

    Minimum numbers of balls to be drawn

    Homework Statement suppose in a box there are 20 red, 30 black,40 blue,and 50 white balls.what is the minimum numbers of balls to be drawn, without replacement,so that you are certain about getting 4 red, 5 black, 6 blue and 7 white balls? Homework EquationsThe Attempt at a Solution so there...
  41. S

    Elastic collision of the rigid balls

    Homework Statement I can't believe it how my brains stopped cooperating today. We have the first ball with ##m_1 ## and ##v_1## and of course the second one with ##m_2## and velocity ##v_2##. Covariance matrix before the collision is ##M= \begin{bmatrix} \sigma _1^2 & 0\\ 0& \sigma _2^2...
  42. S

    Balls elastic collision off center

    Problem Statement: Moe Mentum and Ken Ettik are playing pool. Moe hits the cue ball, sending it towards the 6 ball at 2 m/s. It strikes the stationary 6 ball off-center, moving off at a 60 degree angle from the original direction after a perfectly elastic collision. Both balls have a mass of...
  43. P

    Relative angle between two balls with equal mass after collision

    I´m working on a physics hand-in and found the relative angle between the two balls after collison(where one is stationary before the collison) to be exactly 90degrees, is this random or is it always so? It´s worth mentioning that total momentum and kinetic energy is conserved. The hand in is...
  44. Hijaz Aslam

    Force components of hanging pith balls

    Consider the pith balls in the diagram: Both of them has mass 'm' and charge 'q'. The question asks for the charge on both the pith balls. The concept is a bit straightforward. But I am confused at the force distribution experienced by the pith balls. My text tackles the problem with...
  45. M

    Elastic Collision of 2 balls

    Homework Statement Two spheres of mass M1 and M2 are arranged one above the other as shown. They are separated by a fraction of a mm. They are released from rest and allowed to fall to the ground, a distance h = 5.0 m below. Mass M2 collides elastically with the ground and then elastically...
  46. E

    Balls connected by string--momentum problem

    Homework Statement Two identical balls are interconnected with a massless and inextensible thread. The system is in gravity free space with the thread just taut. Each ball is imparted a velocity v, one towards the other ball and the other perpendicular to the first, at t=0. Then, (A)The thread...
  47. S

    2D Momentum Question on pool balls

    Homework Statement Standard pool balls have a mass of 0.17kg. Before a collision, ball A is at rest and ball B is traveling at 4.5 m/s [N]. After the collision, ball B is traveling at 1.6 m/s [N20E]. What is the velocity of ball A? Homework Equations pinitial = pfinal m1v1 + m2v2 = m1v1 + m2v2...
  48. L

    Troubleshooting Homework Problems - Balls, Cliffs & Falling Objects

    Homework Statement While rolling balls down an inclined plane, Galileo observes that the ball rolls 1 cubit (the distance from elbow to fingertip) as he counts to 10. How far will the ball have rolled from its starting point when he has counted to 20? The answer I get is supposed to be 4...
  49. rjbeery

    Black hole formation with golf balls in GR

    Start with an existing black hole and an event horizon radius R at time T. Say the black hole is being "fed" an infinite series of golf balls, one after the other, which are all stamped numerically such that the current golf ball external to the event horizon is 1.0 * 10^32. See linked img...
  50. A

    Two Balls Drop, what happens to the distance?

    Homework Statement Ball A is dropped from the top of a building. One second later, ball B is dropped from the same building. As time progresses, the distance between them A) increases. [<-- Correct Answer] B) remains constant. C) decreases. D) cannot be determined from the information given...
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