Conservation of Energy max height

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Homework Help Overview

The problem involves an arrow with a specified mass and initial velocity, launched at a 45-degree angle. The objective is to determine the maximum height and the kinetic energy at that height, utilizing concepts from energy conservation.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss breaking down the initial velocity into x and y components and question the relationship between kinetic and potential energy at maximum height. There are inquiries about the forces acting on the arrow and the constancy of horizontal velocity.

Discussion Status

The discussion is ongoing, with participants exploring different aspects of energy conservation and the implications of the arrow's motion. Some guidance has been offered regarding the breakdown of velocity components and the relationship between kinetic and potential energy.

Contextual Notes

Participants note that the information provided is limited, and there is an emphasis on understanding the forces acting on the arrow and the nature of its motion.

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Homework Statement


An arrow(mass=0.2kg) is fired at a 45 degree angle with an inital velocity of 15 m/s. Find it's max height and kinetic energy when it is at it's max height.


Homework Equations


Ek=1/2mv^2
Ep=mgh


The Attempt at a Solution


I tried breaking it down to x and y components, but I don't know if that's right.
 
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What is the kinetic and potential energy of the arrow as it is first fired? What is the velocity of the arrow at the maximum height?
 
Max height has to do with potential energy. Kinetic energy at max height is a conceptual question and idea.
 
Tedjn said:
What is the kinetic and potential energy of the arrow as it is first fired? What is the velocity of the arrow at the maximum height?

that's all the info they gave me.
 
No, what I mean is that you can figure out those two things I asked you from the information you are given. Think about what forces act on the arrow. Does the horizontal velocity ever change?
 
Break the velocity into components.
 

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