Find acceleration and centripetal force

AI Thread Summary
The discussion focuses on determining the rate at which the direction of an object's velocity changes, specifically in relation to centripetal force, which is defined as v^2/r. Participants express confusion about the lack of a radius (r) since the objects do not move in a circle or at uniform speed. Clarification is provided that the red plot represents acceleration, while the blue indicates motion. The conversation highlights the importance of analyzing acceleration orthogonal to the direction of motion for understanding changes in velocity. Overall, the thread emphasizes the complexities of analyzing non-uniform motion in two dimensions.
isukatphysics69
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Homework Statement


Rank the rate at which the direction of each object's velocity is changing, greatest first.

Homework Equations


n/a

The Attempt at a Solution


I know a centripetal = v^2/r, but i don't have r so i am not sure if i am supposed to just eyeball it and draw a reference circle or not..
 

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The objects don't move on a circle, and they don't move at uniform speed either.

What is plotted here? Two spatial dimensions? Blue is the motion I guess. Can you figure out what red is?
 
mfb said:
The objects don't move on a circle, and they don't move at uniform speed either.

What is plotted here? Two spatial dimensions? Blue is the motion I guess. Can you figure out what red is?
Red is acceleration here I'm sorry i forgot to mention
 
mfb said:
The objects don't move on a circle, and they don't move at uniform speed either.

What is plotted here? Two spatial dimensions? Blue is the motion I guess. Can you figure out what red is?
i already submitted the assignment, i still have another physics homework and a physics test tomorrow and i am very stressed >=[

submitted that assignment with the wrong answer
 
isukatphysics69 said:
Red is acceleration
Okay (although it looks odd in (b), there should be an acceleration).
For the change in direction the acceleration along the direction of motion does not matter. Can you find the acceleration orthogonal to it?
 

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