A child is learning to balance on a single foot. At first they co-activate both their tibialis anterior and gastrocnemius. The ground reaction force is solely in the vertical direction with a magnitude 483 N. The center of gravity is located 0.23 m away from the ankle joint. The force from the tibialis anterior is 1337 N. The moment arms for the gastrocnemius is 0.04 m and tibialis anterior is 0.03 m.
Find the force of the gastrocnemius with co-activation. ____________________N
Find the force of the gastrocnemius after the child learns to not co-active the tibialis anterior. ____________________N