Exercise 8 An unhappy rodent with a mass of 0.300 kg is moving at the end of a spring with a spring constant k = 2.50 N / m and is under the influence of a damping force Fx = −b ⋅ vx. a) If the damping constant ???? has the value 0.900 kg / s, what will be the rodent's oscillation frequency? b) What value of ???? causes the motion to be critically damped?