Two muscles in the back of the leg pull upward on the Achilles tendon, as shown

Question

Two muscles in the back of the leg pull upward on the Achilles tendon, as shown in the figure below. (These muscles a are called the medial and lateral heads of the gastrocnemius muscle.) F2 150 N F1 150 N Find the magnitude (in N) and Irection (in degrees counterclockwise from the dotted line) of the total force on the Achilles tendon. magnitude 288 direction from the dotted line What type of movement could be caused by this force? This force can turn the foot to the left or right. This force can twist the ankle to the left or right This force can lower the heel of the foot

Explanation / Answer

(a) Fnet= F cos 16+ F cos 16

Fnet=150cos16 +150 cos16

Fnet=288 N

The net force is along the dotted line . so the angle counterclockwise from the dotted line= 0o

(b)This force can lower the heel of the foot

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