Equilibrium of a particle

  • 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.
  • Hold still please
    problem

    Hold Still Please

    Age
    16 to 18
    Challenge level
    Can you arrange a set of charged particles so that none of them start to move when released from rest?
  • Uniformly unstable
    problem

    Uniformly Unstable

    Age
    16 to 18
    Challenge level

    Invent shapes with different numbers of stable and unstable equilibrium points

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