Equilibrium of a particle

  • Uniformly unstable
    problem

    Uniformly unstable

    Age
    16 to 18
    Challenge level
    filled star empty star empty star
    Invent shapes with different numbers of stable and unstable equilibrium points
  • Hold still please
    problem

    Hold still please

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

    Building up friction

    Age
    16 to 18
    Challenge level
    filled star filled star empty star
    A series of activities to build up intuition on the mathematics of friction.