"Sweet Spot": Meterstick pivot point changes with point struck.

Rigid Body: The Sweet Spot. If the meter stick were a baseball bat,and the P.I. was the ball hitting the Sweet spot, then there would be minimum movement at the batter's wrist to jar the batter's hands and arms... A Meter Stick (or Baseball Bat) is placed on the lecture Table, and a 'cue' stick (another meter stick or pointer) hits the Meter Stick at the Point of Impact (P.I.). At the Sweet Spot, the Meter Stick rotates around one of its ends.
UCB Index: 
A+55+0
PIRA Index: 
3A15.50
Demo Diagram: 

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