1. The problem statement, all variables and given/known data A 45.0-g hard boiled egg moves on the end of a spring with a force constant k = 2.50 N/m. Its initial displacement is 0.500 m. A damping force Fx = -bvx acts on the egg, and the amplitude of the motion decreases to 0.300 m in 4.0 s. Calculate the magnitude of the damping constant b. 2. Relevant equations (1/2)m(v^2) + (1/2)k(x^2) - bv = (1/2)m(A^2) 3. The attempt at a solution So basically I thought you could solve this question by using the above equation. But I'm finding some difficulty in finding the correct value for v (from bv). Also I'm not sure on how to incorporate the fact that the amplitudes change in 4 seconds into this equation. Any help will be appreciated!