Sorry if I used big words and upset your tummy.kinetic energy
Here is some more reading for you:
Conversely, it is also the work needed to de-celerateThe kinetic energy of an object is the energy
which it possesses due to its motion. It is defined
as the work needed to accelerate a body of a given
mass from rest to its stated velocity.
a body of a given mass from it's stated velocity to rest.
Oops, used another big word. Here you go:
Kinetic energy, even though there are pretty big word for
pilots, is important to understand because it is a function
of the square of velocity.
Let's take an aircraft of given mass M and approach
at 60 knots groundspeed. The amount of kinetic energy
that we will have to dissipate either via aerodynamic
braking or via heat into the brakes is:
1/2 M 60^2 = 1800M
Now, let's approach at 80 knots - groundspeed. We could
do that either by indicating 80 knots at a density altitude of
sea level - TAS increases with DA - or we could approach at
70 knots with 10 knots of tailwind. Doesn't matter:
1/2 M 80^2 = 3200M
That's an amazing 77% increase in the amount of kinetic
energy that has to be dissipated during the landing rollout.
I know kinetic energy has some big words in it, and it can
upset your tummy, but what you are doing is in fact applied
physics, so understanding a little bit about what you are doing
can keep you out of the CADORs.