He was still optimistic, but it was a less kinetic, a more thoughtful optimism.
There are no more uses of "kinetic" in the book.
Show samples from other sources
A large ball may not fall faster than a small one, but it has more kinetic energy.
It’s not enough that we have to sit through class after class and try to stay awake while they fill our heads with all this stuff we will probably never need to know, like how to figure out the surface area of a cube or what the difference is between kinetic and potential energy.