Breaking thread above and below weight.

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(A)Mechanics - A+20: Linear Inertia

Linear Inertia: Breaking thread above or below a weight. A quick jerk on the aluminum rod breaks the lower thread. A steady push on the rod breaks the upper thread.
UCB Index: 
A+20+10
PIRA Index: 
1F20.10
Demo Diagram: 

UCB Taxonomy:

PIRA Taxonomy:

Video: 

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