Physics
Force Production
Quick fact
A single muscle cell can generate a force of about 0.2 micronewtons, yet the coordinated action of millions of such cells in your quadriceps can produce over 1,000 newtons—enough to lift several hundred kilograms.
Why this is interesting
Every time you lift a cup or take a step, a microscopic molecular dance inside your body allows you to produce enough force to overcome gravity. But how do tiny proteins generate the strength needed to move your entire body?