What is the acceleration and g-force of a space cannon on the moon?

In summary, the conversation discusses the calculation of acceleration and g-forces experienced by a person on a 215m long cannon with a velocity of 1.66x10^4 ms^-2. The equation V2=u2 + 2ay is used to calculate the acceleration, which is found to be (1.66x10^4)^2/2x215. The discussion also touches on the concept of g-forces, which is defined as the acceleration relative to free-fall and would be around +1 in this scenario.
  • #1
midgetwars
7
0

Homework Statement


What are the acceleration of the cannon and the g-forces experienced if there was a guy on it...

Cannon is 215m long

Velocity is 1.66x10^4 ms^-2

Homework Equations


V2=u2 + 2ay

The Attempt at a Solution


(1.66x104)^2=0 + 2xax215

a = (1.66x104)^2/2x215Ok... So i think that's the acceleration?? I'm not sure.
I am not completely stuck on how to the g-force...
 
Last edited:
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  • #2
G force is normally acceleration compared to the Earth's gravity we experience on the surface. So if you experience 4 G's then you're being accelerated at 4*9.81 m/s^2.
 
  • #3
welcome to pf!

hi midgetwars! welcome to pf! :wink:

(try using the X2 icon just above the Reply box :wink:)

yes, that's fine :smile:

the acceleration (plus 1g) is the g-force

(yes, i know it's called a force :rolleyes: … but it isn't! :biggrin:)

see http://en.wikipedia.org/wiki/G-force" for some details, including …
The g-force (with g from gravitational) on something is its acceleration relative to free-fall.

btw, are you sure it's 215 m … that's a very long cannon!
 
Last edited by a moderator:
  • #4
So the a is

so i got 26 1302.3256 ms0-2...

That means the g-forces are around 26 000 gs? That's seems to be a lot don't you think?? Also wikipedia says the acceleration isn't that high, but doesn't offer a solution


a = (1.06x104)2 / 2x215
 
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  • #5
how did you get that? :confused:

EDIT: oh you've just changed it :redface:
 
  • #6
So is that right?
 
  • #7
a = (1.66x104)2/2x215 is right
 
  • #8
tiny-tim said:
a = (1.66x104)2/2x215 is right


so the G forces would be + 1...?
 
  • #9
+ g, yes :smile:
 

1. How does a space cannon work?

A space cannon is a hypothetical device that uses a large amount of energy to launch objects into space. It involves using a powerful explosion or electromagnetic force to propel the object at high speeds. However, this technology is currently only theoretical and has not been successfully implemented.

2. Can a space cannon be used to send humans to the moon?

While theoretically possible, it is not currently feasible to use a space cannon to send humans to the moon. The amount of force and precision required to launch a spacecraft and safely land it on the moon is currently beyond the capabilities of a space cannon.

3. How far can a space cannon launch an object?

The distance a space cannon can launch an object depends on various factors such as the amount of energy used, the design of the cannon, and the weight of the object. However, it is estimated that a space cannon could potentially launch objects thousands of miles into space.

4. What are the potential dangers of using a space cannon?

One of the main dangers of using a space cannon is the immense amount of force and heat that can be generated during the launch process. This could potentially damage or destroy the object being launched or cause harm to nearby structures or individuals. Additionally, there are ethical and environmental concerns with using such a powerful and potentially destructive technology.

5. Are there any space cannons currently in use?

No, there are currently no functional space cannons in use. While there have been some experimental and theoretical designs proposed, none have been successfully implemented for practical use. Most space launches currently use rockets or other propulsion systems.

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