An unhappy 0.400 kg rodent, moving on the end of a spring with force constant 5.50 N/m, is acted on by a damping force F, = -bvz. Part A If the constant b has the value 0.900 kg/s, vwhat is the frequency of oscillation of the rodent? Express your answer with the appropriate units. HA ? f = Value Units Part B For what value of the constant b will the motion be critically damped? Express your answer in kilogram per second. 1] ? berit = kg/s