7. The figure shows the foot and lower leg of a person standing on the ball of one foot. Three forces act to maintain the equilibrium: the tension force (T=1336) N in the Achilles tendon, the contact force (F_c) at the ankle joint, and the normal force (n) of the ground that supports the person's weight. Find the person's mass. (A) 82 kg (B) 7.2 kg (C) 72 kg (D) 706 kg
Added by Duane B.
Close
Step 1
The person's mass is found by multiplying the tension force (1336 N) by Show more…
Show all steps
Your feedback will help us improve your experience
Supratim Pal and 89 other Physics 101 Mechanics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Figure 12.21 shows the foot and lower leg of a person standing on the ball of one foot. Three forces act to maintain this equilibrium: the tension force $\vec{T}$ in the Achilles tendon, the contact force $\vec{F}_{\mathrm{c}}$ at the ankle joint, and the normal force $\vec{n}$ that supports the person's 697-N weight. The application points for these forces are shown in Fig. $12.21 .$ The person's center of gravity is directly above the contact point with the ground, and you can treat the mass of the foot itself as being negligible. Find the magnitudes of (a) the tension in the Achilles tendon and (b) the contact force at the ankle joint.
Supratim P.
When a person stands on tiptoe on one foot (a strenuous position), the position of the foot is as shown in Figure P12.42a. The total gravitational force $\overrightarrow{\mathbf{F}}_{z}$ on the body is supported by the normal force $\overrightarrow{\mathbf{n}}$ exerted by the floor on the toes of one foot. A mechanical model of the situation is shown in Figure P12.42b, where $\overrightarrow{\mathbf{T}}$ is the force exerted on the foot by the Achilles tendon and $\overrightarrow{\mathbf{R}}$ is the force exerted on the foot by the tibia. Find the values of $T, R,$ and $\theta$ when $F_{g}=700 \mathrm{N}$ (FIGURE CANNOT COPY)
Keerti J.
Recommended Textbooks
University Physics with Modern Physics
Physics: Principles with Applications
Fundamentals of Physics
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD