F=ma Input: newtons second law at wolframalpha.com
You fall as hard as you jumped when you don't stick the landing.
It affects sky divers because the closer you are to the ground the faster you go.
Its a matter of being scientifically rigorous. You can not claim the 2nd law as a law unless you first establish the first law.
its not importsnt
This is because two concepts are derived from the newtons second law. First : Force . F = m * a Second : momentum .. p = m * v
the second law
The clue is in the question.
Actually, the first one is completely independent on the second one. But the second one doesn't make any sense without the first one.
Every single object that exists obeys ALL of Newtons Laws
yea
F = m a