We have the coils too, except we call it a measuring tape.

We also have have a flexible soft version used for measuring human proportions for clothing, but it’s called a “tape measure” for some reason.

I wish we had the foldable kind, that sounds useful.

This is a common ruler where you live?

In my country we have rulers with 12 in/ ~30cm as the most common. We also have “yardstick” which is more often a meter stick now. But no foldable rulers.

So many removed comments…

https://en.m.wikipedia.org/wiki/Child_marriage_in_the_United_States

Huh. In California the legal minimum is 0?

Also are these map colors impossible to read correctly on your screen or is it just me?

Who are these guys

Dude that’s awesome. How did you make these images??

In my understanding, since gravity is acting on us, an external force is applied when we jump. That’s why a jump is a parabola. “Gravity’s Rainbow”