What Is the Resultant Speed After Two Birds Collide?

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Homework Help Overview

The problem involves two birds colliding while swooping down at an angle towards a target. The context is centered around the conservation of momentum and the resultant speed after the collision.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the application of conservation of momentum in the context of the collision, questioning whether velocity is lost during the event and exploring the implications of vector addition in calculating the resultant speed.

Discussion Status

There are differing interpretations regarding the resultant speed after the collision, with some participants affirming the original poster's calculation while others suggest reconsidering the vector nature of momentum. The discussion is ongoing, with no explicit consensus reached.

Contextual Notes

Participants are navigating the complexities of momentum conservation in collisions, particularly the distinction between momentum and energy conservation. There is also a focus on the angles involved in the problem setup.

drewdiddy
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Homework Statement



2 birds of same mass swoop down on a mouse at an angle of 60 deg from horizontal with speed 30 m/s. They collide and stick together, what is their resultant speed?

Homework Equations



Conservation of momentum.

The Attempt at a Solution



This was just on a test I took and I got 26 m/s but I'm thinking it should be just 30 m/s down? Or is some velocity lost during the collision?
 
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drewdiddy said:
Or is some velocity lost during the collision?

Hi drewdiddy! :smile:

Momentum is always conserved in collisions (energy isn't).

So your answer was right. :smile:
 
So it should have been 30 m/s instead of the 26 that I wrote? :(
 
drewdiddy said:
So it should have been 30 m/s instead of the 26 that I wrote? :(

No, your answer was right

momentum is a vector, so you added the two momentums by vector addition, and you got 26 (times 2m). :smile:
 

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