Question

Give reason liquid set in rotation comes to rest after some line

Answer 1

Explanation :

When water in a container or glass tumbler is set into rotation by glass rod , the rotation starts from  co-axial cylindrical layers.

On stopping the rotation by glass rod, the speed of different layers are seen decreasing and liquid finally comes to rest.Which shows that the liquid experiences a internal friction.

Hence Viscosity is the property of fluids by virtue of which an internal resistance or drag[fluid friction ] comes into play when liquid is in motion . The internal friction tries to stop the motion of liquid.

Answer 2

This is because, the water layers experience frictional force with respect to each other.

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