Does initial speed of a gun affect bullet velocity?

AI Thread Summary
The initial speed of a gun can affect bullet velocity, particularly when considering factors like shooting from a moving vehicle or lurching the hand forward while firing. However, the impact on maximum bullet velocity is generally negligible, especially for effective rounds. Even at high speeds, such as 80 mph, the difference in velocity is minimal except for the slowest bullets. Additionally, air resistance can counteract any potential advantages gained from initial speed. Overall, while initial speed has an effect, it is not significant enough to impact the effectiveness of the round.
Matthew Siefring
Messages
2
Reaction score
0
My brother and I were having an argument so I decided to make an account on this forum. Say you were to lurch you hand forward while firing a pistol. Would that affect the max velocity of the bullet?
 
Physics news on Phys.org
It would indeed, just like shooting a gun from a moving vehicle will also affect the velocity of the bullet. The idea is similar to this experiment done by mythbusters:

 
Thanks
 
Would it have an effect on the max velocity of the bullet? yes, but it would be negligible when talking about the effectiveness of the round. Even if you were in a car going 80 mph and shot a bullet directly behind you (or in front of you) it would be negligible in all but the slowest rounds.
 
HA. I remember having this conversation when I was in secondary school ( about 1959). It was about cowboys and rustlers. The question was would the pursuing riders have an advantage of range with their guns over the retreating rustlers. Nothing new under the Sun. :smile:
 
sophiecentaur said:
The question was would the pursuing riders have an advantage of range with their guns over the retreating rustlers.
Rather the opposite, if you consider air resistance.
 
  • Like
Likes sophiecentaur
The rope is tied into the person (the load of 200 pounds) and the rope goes up from the person to a fixed pulley and back down to his hands. He hauls the rope to suspend himself in the air. What is the mechanical advantage of the system? The person will indeed only have to lift half of his body weight (roughly 100 pounds) because he now lessened the load by that same amount. This APPEARS to be a 2:1 because he can hold himself with half the force, but my question is: is that mechanical...
Some physics textbook writer told me that Newton's first law applies only on bodies that feel no interactions at all. He said that if a body is on rest or moves in constant velocity, there is no external force acting on it. But I have heard another form of the law that says the net force acting on a body must be zero. This means there is interactions involved after all. So which one is correct?
Thread 'Beam on an inclined plane'
Hello! I have a question regarding a beam on an inclined plane. I was considering a beam resting on two supports attached to an inclined plane. I was almost sure that the lower support must be more loaded. My imagination about this problem is shown in the picture below. Here is how I wrote the condition of equilibrium forces: $$ \begin{cases} F_{g\parallel}=F_{t1}+F_{t2}, \\ F_{g\perp}=F_{r1}+F_{r2} \end{cases}. $$ On the other hand...
Back
Top