Calculating Muzzle Velocity for Projectile Motion Cannon - 47 meters Fired

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Homework Help Overview

The discussion revolves around calculating the initial muzzle velocity of a cannon that fired a projectile a distance of 47 meters. The problem is situated within the context of projectile motion.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants explore whether to assume a maximum range scenario, which typically involves a launch angle of 45 degrees. There are questions regarding the completeness of the problem statement, particularly the absence of information about the launch angle and other parameters.

Discussion Status

Some participants suggest that the lack of explicit angle information complicates the problem, while others emphasize the importance of posting the question as originally given. A few participants indicate that, under certain assumptions, the angle may not be necessary for calculating the muzzle velocity.

Contextual Notes

There is a noted concern about missing information that could be critical to solving the problem, such as the launch angle and other potential parameters related to the projectile's motion.

NIZBIT
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Someone was fired 47 meters from a cannon. What is th einital muzzle velocity of the cannon?

Am I supposed to assume max range which puts the cannon at 45deg?
 
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If that's exactly how the question was worded, that would be my guess.
 
Well I took out the fancy stuff, but all they gave was the range.
 
NIZBIT said:
Well I took out the fancy stuff, but all they gave was the range.

No angle? No mention of horizontal / vertical? Impact velocity etc?

~H
 
NIZBIT said:
Well I took out the fancy stuff, but all they gave was the range.

It's very easy to overlook useful information. So be careful. In fact, I think it's best if you post the question as it was given to you.
 
NIZBIT said:
Someone was fired 47 meters from a cannon. What is th einital muzzle velocity of the cannon?

Am I supposed to assume max range which puts the cannon at 45deg?
As Siddharth said, you should post the question exactly as it was given. Just stated the way you gave it, it is impossible to answer because there is no information about the initial angle. Sometimes useful information is given using words instead of numbers so every word counts.
 
OK you wanted it. Actually you don't need the angle and as stated earlier for max range the angle has to be 45.

In April 1959, Miss Victoria Zacchini was fired 47m from a cannon in Madison Square Garden, New York City. What was the inital muzzle velocity of the cannon?

[tex]max range=\frac {v^2}{g}[/tex]

so

[tex]47=\frac {v^2}{9.81}[/tex]

v=20.5 m/s
 
Of course , she was trying to set some kind of a record, and so the range would have to be maximum. See how useful posting the entire question can be ?

Arun
 

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