Projectile Motion Problem: Finding Maximum Height and Acceleration Vector

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Homework Help Overview

The discussion revolves around a projectile motion problem, specifically focusing on finding the maximum height and analyzing the acceleration vector. The original poster attempts to calculate the maximum height attained by a projectile and is seeking assistance in further developing their solution based on given conditions.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the calculation of maximum height and the components of the acceleration vector. Some question how to incorporate the condition of continuous speed increase into their analysis, while others suggest that this condition relates to the direction of the horizontal acceleration component.

Discussion Status

The discussion is active, with participants providing hints and suggestions. There is acknowledgment of helpful guidance, particularly regarding the interpretation of the problem's conditions. Multiple interpretations of the implications of the problem's wording are being explored.

Contextual Notes

Participants note that the attachment related to the problem was initially not viewable, which may have impacted the discussion. The original poster expresses uncertainty about how to proceed with the problem based on the provided conditions.

Vibhor
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Homework Statement



attachment.php?attachmentid=71715&stc=1&d=1406557796.png


Homework Equations





The Attempt at a Solution



Maximum height attained by first projectile H = u2sin2θ/2g = 15m

If acceleration vector is assumed a = axi+ayj , then at H √(ax2+ay2) = 50 .

Now I need to use the given conditions to come up with another equation . Not sure how to proceed .

Please help me with the problem .
 

Attachments

  • problem.PNG
    problem.PNG
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Last edited:
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Your attachment isn't viewable.
 
Please see if it is viewable now .
 
Could somebody help me with the problem .
 
Figure out the centripetal acceleration at that point. Hint: Use the fact that the first projectile is at its apex at the point H.
 
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Likes   Reactions: 1 person
Hi Doc

Your suggestion has worked nicely .Thanks a lot :smile:.

I was just wondering what do we infer from the third line in the problem " such that the speed is increasing continuously ". We didn't make any use of it .

Your thoughts ?
 
Vibhor said:
I was just wondering what do we infer from the third line in the problem " such that the speed is increasing continuously ". We didn't make any use of it .
You make use of that fact in determining the direction of the horizontal acceleration component. It tells you that ax is positive.
 
Thank you very much .
 

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