Estimate the walking speed of an average human by modeling their leg as a rod pendulum. A) Use 81 cm as the average length. Use the formula of a physical pendulum I VmgD T=2. D = distance from the axis to the center of mass I = moment of inertia around the axis B) Use the formula for the moment of inertia for a rod: I = M-L C) Given the average stride length of 76 cm, turn your period into a velocity. D) Note that your calculation is for a stiff-legged walk. Would you expect it to be faster or slower if we accounted for knee-bending?