Bullet hits the ground on its return

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    Bullet Ground
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Homework Help Overview

The discussion revolves around a physics problem involving the motion of a bullet as it returns to the ground, specifically examining the effects of air resistance on its speed and kinetic energy. The subject area includes concepts from kinematics and dynamics, particularly in the context of projectile motion and forces acting on the bullet.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the equations governing the bullet's motion both upward and downward, questioning the clarity of the problem statement and the formatting of the original post. There is an attempt to clarify the problem by reformatting it for better understanding.

Discussion Status

The discussion is ongoing, with participants seeking clarification and assistance. Some have attempted to solve related questions, while others express frustration over the complexity of the problem. There is no explicit consensus on the solution, but there is a collaborative effort to understand the problem better.

Contextual Notes

Participants note that the original question may lack clarity, which could be contributing to the difficulty in receiving responses. There is also mention of specific homework questions that relate to the main problem, indicating a broader context of interconnected problems.

SAHM1500
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V^2=Ae^-2kx - g/k (upward motion)
V^2=g/k - Be^2kx (downward motion)

Use the above result to show that , when the bullet hits the ground on its return, the speed will be equal to the expression

Vo Vt / (Vo^2 + Vt^2)^0.5

In which Vo is the initial upward speed and Vt= (mg/C2)^0.5= terminal speed = (g/k)^0.5

This is result allows one to find the fraction of the initial kinetic energy lost through air friction

THIS PROBLEM WILL KILL ME I SPEND DAYS TO SOLVE IT BUT I COULD NOT:(
 
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Can you put this question in a more formatted manner? It's rather hard to follow which is probably why people are viewing but not repsonding...
 
this is may be more clear.
thanks.
 

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did you solve question 2.12? if so what was your answer? 2.12 didn't come out clear enough for me to solve on my own. The question says to use that answer (not the equations) to solve it...
 
Yes i did 2.12 .. I proved *the equations*!
 
Please can anybody help me!
 

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