Dogs—like many animals—stand and walk on their toes. A photo of the rear foot of a dog is shown in Figure P8.50a; Figure P8.50b shows the bones of the leg and foot along with relevant distances. The colored element corresponds to your foot, and the connection with the leg corresponds to your ankle. The Achilles tendon pulls on the end of the foot, along a line 4.0 cm from the ankle. What is the tension in the tendon if a 20 kg dog is supporting ¼ of its weight on one rear foot?

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(a) (b) 9.0 cm FIGURE P8.50 4.0 cm