Question

When a person stands on tiptoe (a strenuous position), the position of the foot is as shown in Figure a. The total gravitational force on the body, $\vec{F_g}$, is supported by the force $\vec{n}$ exerted by the floor on the toes of one foot. A mechanical model of the situation is shown in Figure b, where $\vec{T}$ is the force exerted by the Achilles tendon on the foot and $\vec{R}$ is the force exerted by the tibia on the foot. Find the values of $T$, $R$, and $\theta$ when $F_g = n = 705$ N. (For $\theta$, enter the smaller of the two possible values between $0^\circ$ and $90^\circ$.) Achilles tendon Tibia $15.0^\circ$ $18.0$ cm $25.0$ cm $T = \boxed{\phantom{1234}}$ Your response is within $10\%$ of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. N $R = \boxed{\phantom{1234}}$ Your response differs from the correct answer by more than $10\%$. Double check your calculations. N $\theta = \boxed{\phantom{1234}}$ Your response differs from the correct answer by more than $10\%$. Double check your calculations. $^\circ$

          When a person stands on tiptoe (a strenuous position), the position of the foot is as shown in Figure a. The total gravitational force on the body, $\vec{F_g}$, is supported by the force $\vec{n}$ exerted by the floor on the toes of one foot. A mechanical model of the situation is shown in Figure b, where $\vec{T}$ is the force exerted by the Achilles tendon on the foot and $\vec{R}$ is the force exerted by the tibia on the foot. Find the values of $T$, $R$, and $\theta$ when $F_g = n = 705$ N. (For $\theta$, enter the smaller of the two possible values between $0^\circ$ and $90^\circ$.)
Achilles tendon
Tibia
$15.0^\circ$
$18.0$ cm
$25.0$ cm
$T = \boxed{\phantom{1234}}$
Your response is within $10\%$ of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. N
$R = \boxed{\phantom{1234}}$
Your response differs from the correct answer by more than $10\%$. Double check your calculations. N
$\theta = \boxed{\phantom{1234}}$
Your response differs from the correct answer by more than $10\%$. Double check your calculations. $^\circ$

when a person stands on tiptoe a strenuous position the position of the foot is as shown in figure a the total gravitational force on the body vecfg is supported by the force vecn exerted b 86835

Added by Stacy N.

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