ELI5: Explain Like I'm 5

Inertial response

Inertial response is when something big and heavy starts moving and doesn't want to stop. Let's say you're on a swing and someone gives you a big push. You start moving really fast and it's hard to slow down or stop. That's because of inertia.

Inertia is when something wants to keep doing what it's already doing. So if you're swinging and someone gives you a big push, your body wants to keep moving that same way, even if you try to slow down or stop.

Electricity works the same way. When lots of people are using electricity, the power plants have to make more electricity to keep up. If all those people stop using electricity all at once, the power plants still have to keep making the same amount of electricity. The electricity is like the swing, it wants to keep moving the same amount even if people aren't using it anymore.

That's where inertial response comes in. It's like putting on the brakes on the swing to slow it down. Electricity systems have things in place to help slow down the electricity when people stop using it, so that it doesn't keep going too fast and cause problems. This helps keep the electricity system working safely and smoothly.