r/theydidthemath • u/McDelper • 21h ago

[Request] what is the G force experienced by the fish in this video

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8

u/ankerverse 21h ago

Not sure about the G forces on the fish itself, but I'd be more curious if anyone can calculate the amount of force the fish applies to the sand when it buries itself?

4

u/GroundMeet 19h ago

Its not possible to calculate the g force without knowing how much resistance the ground puts on the fish on entrance, it looks more like it glides through loosely packed earth rather than actually digging through so to speak, so id guess the g force is not much higher than a fish swimming in water at a high speed, but i dont have a way to confirm.

3

u/smooshiebear 14h ago

I don't think this is correct. The G- Force is simply a ratio of Target's acceleration versus acceleration due to earths gravity. So when said fish accelerates through the water to go into the sand, presumably would be the max g-force, and that would be higher than his acceleration through the sand. Either way, the force his face hit the ocean floor would be approximately equal to "getting hit in the face with a lot of sand really hard."

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u/GroundMeet 14h ago

Ah i see, im not very experienced yet and apparently misremembered, thank you

1

u/ProsperousPlanet 4h ago

Hmm the g force of earth although part of the equation is not really the relevant part.

The force g you feel on earth is constant, any acceleration you have gives you a different vector "g" force based strictly on your acceleration irrespective of earths gravity.

Hence orbiting Earth you are still in earths field but it is balanced by centripedal force.

a= v2 /r ---Christiaan Huygens 1659