AP Physics: Designing a Loop to Pull 4 G's

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Homework Help Overview

The discussion revolves around designing a loop in an AP Physics context that achieves approximately 4 G's of acceleration. The original poster mentions a specific relationship between the loop's diameter and the initial drop height, providing a numerical example of the drop height and resulting velocity.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants discuss the relationship between the loop's design and the G forces experienced, with questions about whether the 4 G's refer to maximum, minimum, or average forces. There is also mention of the Clothoid loop and its effects on G forces and jerk.

Discussion Status

The discussion is active, with participants exploring different interpretations of the G forces and clarifying the role of the Clothoid loop in the design. Some guidance has been offered regarding the nature of the forces involved, but no consensus has been reached on the calculations or design specifics.

Contextual Notes

The original poster provides a specific drop height and velocity, which may influence the calculations and assumptions being discussed. There is an implication of constraints based on homework requirements, but these are not fully detailed.

Daniel Abramow
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Homework Statement


In my AP Physics class we need to design a loop that pulls around 4 G's. From what I understand, the diameter of the loop must be 2/5 times the initial drop. I cannot seems to get the G forces around 4. Any help? I found that the Clothoid loop reduces G forces but I can't figure out the calculations. We can assume the initial drop is .305 meters. This drop yields a velocity at the bottom of the drop of 2.445 m/s.
 
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Daniel Abramow said:
a loop that pulls around 4 G's
At maximum, minimum or average?
Daniel Abramow said:
I found that the Clothoid loop reduces G forces
No, I believe it minimises jerk, which is the rate of change of acceleration.
 
Well the maximum G force is 4
 
Daniel Abramow said:
Well the maximum G force is 4
So how strong is the centripetal/centrifugal force?
 

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