UCM to Projectile: Optimum Launch Angle/Velocity Dependence?

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Discussion Overview

The discussion centers around the relationship between the optimal launch angle of a projectile and its initial tangential velocity when launched from uniform circular motion, specifically in the absence of air drag. Participants explore the implications of this relationship and seek clarification on the definition of "optimal." The conversation includes technical reasoning and challenges regarding the range of projectile motion.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant reports a simulation indicating that the optimal launch angle is dependent on the initial tangential velocity when leaving uniform circular motion.
  • Another participant questions the definition of "optimal," seeking clarification on what is meant by the term.
  • A further clarification is provided that "optimal" refers to the angle that produces the maximum range of the projectile.
  • Concerns are raised about the comparison of launching from uniform circular motion versus other launch methods, such as from ground level.
  • A participant cites the range equation for projectile motion, suggesting that the maximum range is achieved at a 45-degree angle regardless of initial velocity when launched from ground level.

Areas of Agreement / Disagreement

Participants express differing views on the dependency of the optimal launch angle on initial velocity, with some questioning the validity of this claim while others support it based on simulation results. The discussion remains unresolved regarding the implications of launching from uniform circular motion versus other methods.

Contextual Notes

The discussion highlights potential limitations in understanding the conditions under which the optimal angle is defined, including the absence of air drag and the specific context of the launch scenario.

daveschorr
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I ran a simulation on WinPlot (see attached video) on my computer and was a bit surprised to see that the optimal launch angle of a projectile (with NO air drag) leaving uniform circular motion is dependent on the initial tangential velocity (or at least Winplot thinks it does).

Can someone shed some light on this phenomenon or point me to my error?

 
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daveschorr said:
optimal launch angle of a projectile (with NO air drag) leaving uniform circular motion is dependent on the initial tangential velocity
What is "optimal?"
 
By "optimal," I mean the angle that produces the maximum range.
 
daveschorr said:
uniform circular motion
As compared to what sort of launch?
 
Bystander said:
As compared to what sort of launch?
As opposed to being launched from ground level from a cannon or something.
The range equation (with no air drag) is ##R=v^2sin(2a)/(2g)##. In that case the maximum range is achieved by using a 45 degree angle of elevation REGARDLESS of the initial velocity.
 

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