PhysicsEasy148×since 2002Q7891Spherical balls of radius RRR are falling in a viscous fluid of viscosity η\etaη with a velocity v.v.v. The retarding viscous force acting on the spherical ball isAinversely proportional to both radius RRR and velocity vvvBdirectly proportional to both radius RRR and velocity vvvCdirectly proportional to RRR but inversely proportional to vvvDinversely proportional to R,R,R, but directly proportional to velocity vvvCheck answerSkip