Lesson Plan: Torque of a Force Physics • 9th Grade

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to use the formula 𝑇 = 𝐹𝑑 to calculate the torque of a force about a rotation axis and also to calculate the net torque.


Students will be able to

  • use the following formula in all combinations: torque about a point due to a force = the force × the perpendicular distance of the point of action of the force from the point,
  • recognize that the unit of torque is the newton-meter.


Students should already be familiar with

  • center of mass,
  • the normal reaction force.


Students will not cover

  • objects that have forces acting on them at angles to the object other than right angles.

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