Solving Velocity Problem: Initial Force 500N & Mass 1.5g Over 20m

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Homework Help Overview

The problem involves determining the initial velocity of a bullet with a mass of 1.5g, fired from a gun with an initial force of 500 N over a distance of 20m. The context is rooted in dynamics and kinematics.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the possibility of using equations of motion to find acceleration and velocity, with some suggesting the use of formulas that do not involve time. Others express confusion about the appropriate equations to apply, particularly questioning the relevance of a spring formula.

Discussion Status

The discussion is ongoing, with participants exploring different interpretations of the problem and the equations that may apply. Some guidance has been offered regarding the use of motion formulas, but there is no consensus on the best approach or the correct interpretation of the question.

Contextual Notes

There are concerns about the wording of the question, particularly regarding the definition of initial versus final velocity, and the lack of clarity on the role of acceleration in the scenario presented.

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Homework Statement



A bullet with a mass of 1.5g is fired from a gun with an initial force of 500 N over 20m
Find the initial velocity of the bullet as it leaves the muzzle.


Homework Equations



m=1.5g, F=500N, d=20m


The Attempt at a Solution



i can't seem to find the equation that would fit this problem any help or advice would be greatly appreciated
 
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Given the force, you can find the acceleration easily.
Have you got an accelerated motion formula with no t in it?
There is one with just velocity, acceleration and distance that just kills this kind of question.

If you don't have it, I suggest you find the time it takes to travel the 20 m long gun barrel (wow, long one!). Then you can use the usual accelerated motion formulas to get the speed at that time.
 
i need to find the initial velocity, there is no acceleration involved i just can't find any equation that would work

the best one I've found is v^2= (kx^2)/m but i can't find k from the info i have so I am stuck. if i had k then i could solve this problem.
 
The question is poorly worded - it wants the velocity when the bullet leaves the gun and that would better be called the final velocity.
It most certainly will accelerate with 500 N applied to .0015 kg.

v^2= (kx^2)/m looks like a spring formula. You don't have a spring here.
 

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