If you are watching someone drive a by you at 100 mph, and they fire a projectile out the back at 100 mph, in the opposite direction they are traveling, will you see the projectile just fall to the ground?
Yes.
In a vacuum - yes. In the air, no. It would get caught in the turbulence behind the car and whirled around on it’s way to the ground.
Summer school in Texas?
I agree with the above answers provided that you mean 100 mph in the opposite direction with respect to the car rather than ground. Sorry to be picky.
That’s one slowwww bullet.
I am not sure how you could confuse the statement about the opposite direction they are traveling with being the opposite from the ground. And sorry? Don’t be, you chose to be picky so you don’t need to apologize.
I am not sure how you would confuse the opposite direction they are traveling with the ground. And don’t be sorry for being picky, you chose to be that way so there is no need to apologize.
I think the confusion came from thinking the opposite direction that the ground appears to be moving in relation to the person firing the weapon.
I’m not confused in the least, just explicitly stating an assumption. The opposite direction refers to the direction they fired the bullet. The speed of the bullet with respect to what frame of reference is another matter entirely.
A projectile fired out the back of a moving vehicle would impact SOME force back into the vehicle, so that it’s speed relative to the observer would increase slightly (100.001 mph) at the moment the force was imparted onto the projectile. A “muzzle velocity” of 100mph, would then mean the projectile was falling NOT directly downward, but falling down slightly toward the departing vehicle. Barring turbulence and all that reality stuff that messes with math.