Standing on Tiptoes When you stand on your tiptoes, your feet pivot about your an...

Standing on Tiptoes

When you stand on your tiptoes, your feet pivot about your ankle. As shown in Figure P8.63, the forces on your foot are an upward force on your toes from the floor, a downward force on your ankle from the lower leg bone, and an upward force on the heel of your foot from your Achilles tendon. Suppose a 60 kg woman stands on tiptoes with the sole of her foot making a 25° angle with the floor. Assume that each foot supports half her weight.

What upward force does the Achilles tendon exert on the heel of her foot?

A. 290 N

B. 420 N

C. 590 N

D. 880 N