5 ms·

What you say is true but most objects are not starting from rest at infinity. Things thrown up from the Earth, for example. It also neglects that there is an a

• halter73 13y ago
  >Impact Velocity - This is the velocity of the projectile before it enters the atmosphere. The minimum impact velocity on Earth is 11 km/s. I think it's implied that the impacting objects come from outside the Earth-Moon System. Otherwise there would obviously be no minimum impact velocity.