What is Projectile Kinetic Energy?

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Homework Help Overview

The discussion revolves around the concept of kinetic energy in the context of projectile motion, specifically addressing the kinetic energy of a ball at its maximum height. Participants are exploring the implications of different launch angles and the associated calculations.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Some participants question the treatment of kinetic energy at maximum height, while others discuss the necessary components of velocity in projectile motion. There are attempts to clarify the correct height to use in calculations based on the launch angle.

Discussion Status

The discussion includes some guidance on calculating the vertical and horizontal components of velocity. However, there appears to be a lack of consensus regarding the correct interpretation of kinetic energy at maximum height and the appropriate values to use in calculations.

Contextual Notes

There are indications of confusion regarding the height values used in calculations, as well as the conditions under which kinetic energy is considered. The original poster's initial assumptions are being questioned, and edits to previous posts suggest ongoing clarification efforts.

slaw155
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Last edited:
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The ball has some kinetic energy at it's maximum height which you've neglected.

Edit:
I said you would be right if it was launched straight up, but that's not true. Sorry, I'm tired.
(If it was launched straight up you would use 8.2m for "h" not 12.9m)
 
Last edited:
v=47.6 m/s
Is that the right answer?
calculate vertical component and horizontal component separately.
 
Last edited:
ASHU said:
v=47.6 m/s
Is that the right answer?

Yes.
 

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