- #1

By55

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- Homework Statement
- Already posted

- Relevant Equations
- Basic eq that states that for a stationary object the sum of forces is 0 and for a statinary object also the sum of moments is 0.

**TL;DR Summary:**I had this question in my voluntary homework, but I cant seem to get it done the right way. I have tried to make the balance equations for the x and z axis as well as one for the moment.

Full question here, also as a PNG below

Based on the gait analysis experiments, the following information is available: the vertical component of ground reaction force (GRF) is 67 N, the horizontal component of GRF is 15 N. The horizontal distance between the GRF and the ankle joint b = 3.2 cm, and the vertical distance d = 2.6 cm. The inclination of the tibia in the sagittal plane is 10° and the Achilles tendon force is assumed to be parallel to the tibial longitudinal axis and acting at a distance of 25.4 mm. Calculate the Achilles tendon force and the joint reaction force. (answers: Ft ≈ 776 N, Rx ≈ 67 N, Rz ≈ 1.4 kN).

Typo in the picture, vertical GRF is 67N)

My answer so far in the pdf, ask if (when) there is something you cant understand

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