Potential vs kinetic energy

As the swing reaches its highest point it has all potential energy. When it reaches the lowest, it is all kinetic energy. As it moves up, the pull of gravity changes the kinetic into potential.

Fleur is full of potential energy. She breaks into converting it into kinetic energy at a whim. Usually it is predictable:

  • To get the cat
  • To go play on the playset
  • To pet a dog
  • To be chased
  • To get into the street

Tonight she caught me by surprise. After bath, she wanted to read the Pout-Pout Fish. And right before the kissy part she leaves the room and tells me to get up. I try to finish, but she is insistent. So, I do and she takes off. It was her favorite route in a circle.

Coefficient of friction

One of the considerations for letting Fleur go slide is the pants she wears. Something I didn’t know before being a parent was different pants have different coefficients of friction.

The force required to move two sliding surfaces over each other, divided by the force holding them together. It is reduced once the motion has started.

theFREEdictionary
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And drag.

Every time I let her go with the slicker pants, I chide myself for not having made the better physics choice. She flies down the slide.

It is one of those designs with a bump in the middle. She can go so fast she gets enough air to land just before careening off the end.

With pants providing enough friction, she doesn’t get too much speed. And I don’t feel the need to be too vigilant.

Again

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Ride a horsey, ride a horsey

Down to town. Woah little Fleur

Don’t faaaaaaaallllllll Doooooown.

Fleur loves it. Over and over and over. Again. Again. Again. She doesn’t have the word, but she will get in place and help you get ready to do it again.

It reminds me of the engineer who built a ballista for launching balls for his dog. As the parent, I tire of the game before she does. That is why I have a spouse!

Valkyrie cry

Fleur now has what I can only describe as a war cry. She lets out this piercing cry just before charging at someone. Usually, she does this towards the cat who flees in terror. (Puffed up tail.) When we play chase, she will use it on me.

She just needs a sword and shield and a bigger flail.