When a metallic sphere is dropped in a long column of a liquid, the motion of the sphere is opposed by the viscous force of the liquid. If the apparent weight of the sphere equals to the retarding forces on it, the sphere moves down with a velocity called:

critical velocity

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terminal velocity

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velocity gradient

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constant velocity

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Solution

The correct option is B terminal velocity
Terminal velocity is the speed of the object when net force on the object is zero. If the apparent weight of the sphere equals to the retarding forces on it, then net force on it is zero. So, sphere moves down with terminal velocity.

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When a metallic sphere is dropped in a long column of a liquid, the motion of the sphere is opposed by the viscous force of the liquid. If the apparent weight of the sphere equals to the retarding forces on it, the sphere moves down with a velocity called:

The correct option is B terminal velocityTerminal velocity is the speed of the object when net force on the object is zero. If the apparent weight of the sphere equals to the retarding forces on it, then net force on it is zero. So, sphere moves down with terminal velocity.

The correct option is B terminal velocity
Terminal velocity is the speed of the object when net force on the object is zero. If the apparent weight of the sphere equals to the retarding forces on it, then net force on it is zero. So, sphere moves down with terminal velocity.