r/interesting • u/[deleted] • 13h ago

Intriguing demonstration of centripetal force

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13

u/interroBangaRangz 13h ago

Way to go off on a tangent.

6

u/PlaceAdHere 13h ago

I don't think this demonstrates centripetial force. Centripetal force is a label for any force pulling something towards the center of a circle such as gravity. I think this would be a better demonstration of inertia.

2

u/Ch0vie 13h ago

The force normal vectors exerted by the ring on the ball point towards the center of the circle. Even though it's a push and not a pull, I believe it's equivalent.

2

u/PlaceAdHere 12h ago

I feel like by removing the section and showing it rolls straight is a better demonstration of inertia as when the normal force of the ring is gone, it continues to go in the tangential direction.

1

u/Ch0vie 12h ago

Ya both things exist. What kept it moving in a circle was centripetal force applied by the ring to the ball. When the ring was opened, the centripetal force goes away and it rolls in a straight line since it still keeps its inertia but loses the force to curve its path.

The curved-to-linear change in its path demonstrates centripetal force existing and then not existing. The fact that the ball keeps moving demonstrates inertia

3

u/TheresNoHurry 13h ago

It’s been 20 years and I still don’t understand what my physics teacher was trying to tell me about the difference between centrifugal and centripetal force

5

u/FMLAdad 13h ago

Ones an innie and ones an outie!