You're doing a lot more work than you realize (most of which goes unpaid). This lesson will introduce the definition of work we use in physics, which will give us another way to think about forces and movement.
Weighing machines of all sorts employ springs that take a certain amount of force to keep compressed or stretched to a certain point. Hooke's law will give us all the tools to weigh in on the subject ourselves and spring into action (pun intended)!
"Energy" is a word that's used a lot. Here, you'll learn about how it's one of the most useful concepts in physics. Along the way, we'll talk about work, kinetic energy, potential energy, and conservation of energy.