Originally Posted by
Winemaker
The extreme other example is a projectile (rifle bullet for example) that is fired absolutely horizontally. During its flight the bullet will experience a downward force from gravity of 9.8 m/sec^2. If the bullet is shot from a mountain top, in one second it will fall 9.8 m....
Since I'm being pedantic....
As you've admitted to pedantry for the sake of accuracy, I'm sure you'll accept my correction of your errors...
The bullet would experience a force from gravity of 9.8 . (mass in kg). The 9.8 m/sec^s quantity you wrongly claim to be the force acting upon it is in fact the acceleration it would experience.
Also, in 1 second, the bullet (or any falling object) would reach a vertical velocity of 9.8m/s, but it would only have fallen only 5m (S = u.t + 1/2.a.t^2), not 9.8m as you claim.