perception distance.
This distance is called the 'Thinking Distance'.
Reaction time
The distance light travels in a year is called light-year
That is the "stroke" of the piston.
No, the distance an object travels in unit time is called speed. The distance travelled per unit time in a specified direction is called velocity. The rate of change of velocity is called acceleration.
A light year
Santa travels in a sleigh pulled by reindeer.
It was called the Lunar rover.
A vehicle that travels over water or land on a cushion of air is called a hovercraft
That is called a light-year.
That's called the speed.
1 Light Year