$7$:$57$

Assignment$3$

$52$

$3.$ Sammy decided to walk home from the gym. A diagram of him is shown below, along with his given coordinates. Use the CSB conventions to answer the following questions.

Hip$=(Hx,Hy)=(6,12)$

Knee ${?}^{-}=(Kx,Ky)=(9,6)$

Ankle $=(Ax,Ay)=(8,0)$

Foot $=(Fx,Fy)=(8\mathrm{.}5,-1)$

a$.$ Calculate the segment angle of the shank $({}_{\text{s}\text{h}\text{a}\text{n}\text{k}})$

b$.$ Calculate the segment angle of foot $({}_{\text{f}\text{o}\text{o}\text{t}})$

$5$

HC

QR cdots

c$.$ Calculate the joint angle of ankle $({}_{\text{a}\text{n}\text{k}\text{l}\text{e}})$

Use only the following information to answer part d$.$ Still use the CBS conventions.

Use only the following information to answer part d$.$ Still use the CBS conventions.

Riaht Knee Inint Anale

Figure $1.$ Right sagittal knee joint angle vs $\%$ Gait Cycle. Johnny's change in his right sagittal knee joint angle as he completes one gait cycle $($to $100\%).$

Figure $2.$ Sagittal few of Johnny's right leg and joint angles at this instance in time.

$6$

d$.$ What is the length of Johnny's thigh segment if he is at $75\%$ of a full gait cycle $($Fig $1)?$ A sagittal view of his right leg at this point in time is shown in Fig $2.$ No units needed in final answer.