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/sci/ - Science & Math

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6546987 No.6546987[DELETED]  [Reply] [Original]

If I'm standing up straight, holding a bowl of water in front of me with my arms locked (such that the bowl remains a constant distance from my body and the ground), and I spin in a circle, why does the water in the bowl spin? If I spin counter-clockwise, the liquid spins clockwise, and if I spin clockwise the liquid spins counter-clockwise.

>> No.6547044

>>6546987
My hunch is that it reduces to viscosity in a fundamental level, though kinematically I'm not sure, too lazy to grab a pencil right now.

>> No.6547069

>>6546987
It's because an object (the water molecules) at rest wants to stay at rest. The water has inertia.

>> No.6547103

>>6547069

How does the centrifugal force translate into rotation about the center of the bowl of water? For better visualization, if it helps, the bowl of water is close in shape to half of a sphere, with the water's surface parallel to the ground.

>> No.6547136

>>6547103
the water farther away and the one close to you move at different speeds

>> No.6547138

>>6547103
Angular velocity is the same in every point but linear velocity is not.