• Balance
  • Proportional Reasoning
  • Torque
  • Lever Arm
  • Rotational Equilibrium

Sample Learning Goals

At the end of the lesson, students should be able to:

  • Predict answer based on concepts learnt

    Balancing Act

  • Calculate the total clockwise or anticlockwise moments
  • Determine if the beam is balanced
  • recall and apply the relationship moment of a force (or torque) = force × perpendicular distance from the pivot to new situations or to solve related problems
  • apply the principle of moments to new situations or to solve related problems


Before this lesson, students should be able to:

  • Recall the formula moments = force x perpendicular distance
  • Identify the direction of moments



For Teachers


Software Requirements












Other Resources



end faq

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  • Primary
  • Secondary
  • Turning Effects of Forces
  • Science
  • Simulations