MHT CET 2026 Physics question

A spherical object is falling under gravity through a viscous fluid. The sphere attains the terminal velocity when

(A)viscous force is zero.
(B)buoyant force is equal to force due to gravity
(C)viscous force plus force of gravity becomes equal to buoyant force.
(D)buoyant force plus viscous force becomes equal to force due to gravity.Correct

Answer: (D)

Solution

A sphere falling in a viscous fluid has weight acting downward, and the buoyant force and the viscous drag both acting upward (opposing the downward motion). The viscous force grows with speed; terminal velocity is reached when the net force becomes zero, i.e. , option (D). Option (A)

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Question ID VK-100369