Need clarification of projectile motion

  • Thread starter rashad764
  • Start date
  • #1
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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Answers and Replies

  • #2
phinds
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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.
 
  • #3
berkeman
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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...
 
  • #4
rashad764
How long does it take a rock to drop 2cm when released?

And 0.2m is not equal to 2cm...
thanks
 
  • #5
berkeman
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58,178
8,237
thanks
You are welcome. What is your answer to my first question? :smile:
 

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