Need clarification of projectile motion

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Homework Help Overview

The discussion revolves around a projectile motion problem involving a rifle aimed horizontally at a target 50 meters away, with the bullet hitting the target 2.0 cm below the aim point. Participants are exploring the implications of the bullet's flight time and speed based on the given parameters.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants are attempting to clarify the calculation of the vertical displacement, specifically questioning how -0.2 m is derived for y1. There is also a mention of the importance of drawing a diagram to visualize the problem.

Discussion Status

The discussion is ongoing, with participants raising questions about the initial conditions and the relationship between the measurements provided. Some are exploring the time it takes for an object to fall a certain distance, indicating a search for deeper understanding rather than a straightforward solution.

Contextual Notes

There is a noted discrepancy between the values of 0.2 m and 2 cm, which some participants are questioning. The original poster references previous instruction from a teacher, suggesting that there may be some foundational knowledge that is being revisited.

rashad764

Homework Statement


A rifle is aimed horizontally at a target 50m away. The bullet hits the target 2.0 cm below the aim point. What was the bullets flight time and speed.
t0=0s
x0=0m
y1=-0.2m
x1=50m
vox=v0
voy=0m/s

Homework Equations


Y1=1/2ay^2+v0t+y0
x1/t=vox

The Attempt at a Solution


My teacher went over this problem already, but I'm trying to understand how -0.2m is obtained for y1.
 
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rashad764 said:
My teacher went over this problem already, but I'm trying to understand how -0.2m is obtained for y1.
What was the origin? It's fairly useless to try to do these problems without drawing a diagram showing what's happening and what each variable represents.
 
rashad764 said:

Homework Statement


A rifle is aimed horizontally at a target 50m away. The bullet hits the target 2.0 cm below the aim point. What was the bullets flight time and speed.
t0=0s
x0=0m
y1=-0.2m
x1=50m
vox=v0
voy=0m/s

Homework Equations


Y1=1/2ay^2+v0t+y0
x1/t=vox

The Attempt at a Solution


My teacher went over this problem already, but I'm trying to understand how -0.2m is obtained for y1.
How long does it take a rock to drop 2cm when released?

And 0.2m is not equal to 2cm...
 
berkeman said:
How long does it take a rock to drop 2cm when released?

And 0.2m is not equal to 2cm...
thanks
 
rashad764 said:
thanks
You are welcome. What is your answer to my first question? :smile:
 

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