Forces

  • Whirlyball
    problem
    Favourite

    Whirlyball

    Age
    16 to 18
    Challenge level
    Whirl a conker around in a horizontal circle on a piece of string. What is the smallest angular speed with which it can whirl?
  • Building up friction
    problem
    Favourite

    Building Up Friction

    Age
    16 to 18
    Challenge level
    A series of activities to build up intuition on the mathematics of friction.
  • More bridge building
    problem
    Favourite

    More Bridge Building

    Age
    16 to 18
    Challenge level
    Which parts of these framework bridges are in tension and which parts are in compression?
  • Lunar Leaper
    problem
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    Lunar Leaper

    Age
    16 to 18
    Challenge level

    Gravity on the Moon is about 1/6th that on the Earth. A pole-vaulter 2 metres tall can clear a 5 metres pole on the Earth. How high a pole could he clear on the Moon?

  • Bridge builder
    problem
    Favourite

    Bridge Builder

    Age
    16 to 18
    Challenge level
    In this short problem we investigate the tensions and compressions in a framework made from springs and ropes.
  • Thinking Mathematically - Short Problems
    problem
    Favourite

    Cannon Balls

    Age
    16 to 18
    Challenge level

    How high will a ball taking a million seconds to fall travel?

  • Baked Bean Cans
    problem

    Baked Bean Cans

    Age
    5 to 7
    Challenge level
    Is there a best way to stack cans? What do different supermarkets do? How high can you safely stack the cans?
  • Uniformly unstable
    problem

    Uniformly Unstable

    Age
    16 to 18
    Challenge level

    Invent shapes with different numbers of stable and unstable equilibrium points

  • \Little little g
    problem

    Little Little G

    Age
    16 to 18
    Challenge level

    See how little g and your weight varies around the world. Did this variation help Bob Beamon to long-jumping succes in 1968?

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