What is work in physics and how is it different from being busy?
Busy vs. Work
What is work in physics and how is it different from being busy?
You know that feeling after a long, exhausting day — answering emails, standing in line, holding your phone — when you flop down and say, "I worked SO hard today"? Physics looks at you, raises an eyebrow, and says, "Did you, though?" Because in physics, the word "work" means something surprisingly specific. And being busy doesn't count.
Here's the rule. In physics, work happens when you push or pull on something AND it actually moves in the direction you pushed. That's it. A force, plus motion in that force's direction. No motion, no work — no matter how sweaty you get.
