ES 446 – Biomechanics of Human Movement

Inverse Dynamics Take Home Final

For a person that is 55.12 inches tall and has a weight of 171.6 lbs, calculate the forces (x & y) and moments at the ankle and the knee for the following situation. For each variable you are to fully explain what they stand for AND their practical definition. The person is in the swing phase of the gait cycle and has the following kinematic values:

Position of the foot: 133° CCW from the positive horizontal

Position of the lower leg: 28° CCW from the positive horizontal

Horizontal Acceleration of the foot: -9 m/s2

Vertical Acceleration of the foot: 5 m/s2

Angular Acceleration of the ankle: -573 °/s2

Horizontal Acceleration of the lower leg: 6.5 m/s2

Vertical Acceleration of the lower leg: -4 m/s2

Angular Acceleration of the knee: 341 rad/s2.