Physics
High School (9–10)
General
Mechanics › Work, Energy and PowerChapter 4Contains Standard contentWork and Energy
You push a heavy cart and you get tired. You sit and read for an hour, and you are tired too. Which one is work in physics? In this chapter we learn what work is and how we measure it. Then we meet energy, the stored ability to do work, and we follow it as it changes from one form to another. We end with power and the unit that appears on an electricity bill. Python helps us with the calculations.
Part of Physics · High School (9–10) (chapter 4)
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Work and Its Measurement
A student pushes hard against a wall for a long time and the wall does not move. Did the student do work? In physics the answer is no. Here we learn what work means, how to measure it in joules, and when it is positive, negative or zero.
Kinetic and Potential Energy
A moving ball can break a window, and a stone on a roof can break it too, when it falls. Both have energy. In this course we find the energy of motion and the energy of position, and we learn how to calculate each one.