A solid sphere falls with a terminal velocity | vedclass

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(D) Terminal velocity is reached when the net force acting on a body moving through a viscous fluid is zero. The forces involved are the gravitational

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zero

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(D) Terminal velocity is reached when the net force acting on a body moving through a viscous fluid is zero. The forces involved are the gravitational force (weight),the buoyant force,and the viscous drag force.In the Earth's gravitational field,the weight $W = mg$ acts downwards,providing the driving force for the sphere to move through the fluid.In a region outside the Earth's gravitational field,the gravitational force (weight) acting on the sphere is zero $(g = 0)$.Since there is no driving force to overcome the viscous drag,the sphere will not move through the fluid.Therefore,the terminal velocity will be zero.

$A$ solid sphere falls with a terminal velocity of $10 \, cm/s$ in the Earth's gravitational field. If it is allowed to fall freely in a region outside the gravitational field of the Earth,the terminal velocity will be:

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