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The students should understand that power developed P is the rate of work done, or the rate of energy transfer, as given by P = ΔW/Δt = Fv


Here are experiments our science specialists have selected to support this IB* topic.

Introduction to Weight Lifting

Experiment #2 from Vernier Video Analysis: Conservation Laws and Forces

  • Use video analysis techniques to obtain position, velocity, and time data for a human subject performing the bench press.
  • Analyze the position and velocity vs. time graphs for the vertical motion of the bar as it is raised during the slow and fast press.
  • Calculate the net force and lift force for the rising phase of the lift.
  • Calculate work and power for the rising phase of the lift.
  • [Extensions] Create and analyze your own videos of a person lifting in different ways.

Educational Standard
International Baccalaureate (IB) 2025
A Space, time and motion
A.3 Work, energy and power
Standard level and higher level

* The IB Diploma Program is an official program of the International Baccalaureate Organization (IBO) which authorizes schools to offer it. The material available here has been developed independently of the IBO and is not endorsed by it.