What is inertia and why is it hard to push a heavy shopping cart?
Stubborn Cart Mystery
What is inertia and why is it hard to push a heavy shopping cart?
Picture yourself in a grocery store, leaning into a heavy cart that just will not budge. You push, you grunt, you check whether the wheels are stuck. They're not. Something invisible is holding you back — and it has a name.
That invisible something is called inertia. Inertia is a simple, stubborn rule that everything in the universe seems to follow: things like to keep doing whatever they're already doing. If a thing is sitting still, it wants to stay still. If it's moving, it wants to keep moving.
