Question: (7%) Problem 6: The frictional forces in joints are relatively small in all circumstances except when the joints deteriorate, such as from injury or arthritis.

(7%) Problem 6: The frictional forces in joints are relatively small

(7%) Problem 6: The frictional forces in joints are relatively small in all circumstances except when the joints deteriorate, such as from injury or arthritis. Increased frictional forces can cause further damage and pain. The knee joint is where the femur (a bone located in the thigh) meets the tibia (a bone located in the lower leg). Assume that half of the the weight, Fw, of a person is supported by each leg resulting in normal forces between the femur and tibia. Suppose that FW =896 N, and the coefcients of static and kinetic friction are #5 =0.0165 and pk =0.0131, respectively. Tran ,Theresa , ttran55@mail,sfsu.edu @theexpertta.com 7 tracking id: 6C6577EAA07417B9BD732189. In accordance with Expert TA's Terms of Service. copying this information to any solutions sharing website is strictly forbidden. Doing so may result in termination of your Expert TA Account. E (y 33% Part (a) What is the relationship between fsmm 'alld fk? fsmax> r I/ Correct! E & 33% Part (b) Suppose the person steps onto a horizontal conveyor belt. What is the maximum value of the static frictional force in one knee joint? D A 33% Part (c) The person jumps from a short wall to the ground below, landing evenly on both feet. The effects of impact with the ground are equivalent to increasing the person's weight to 19.6 times the actual weight. What is the maximum value of the static frictional force in one knee joint as the person's feet make impact with the ground? f\" E N 6\"\" mm s _ Deductions 0% Potential 100% ( ) 7 8 9 HOME TA "l 4 5 6 '_ Submissions I * l 2 3 * Attempts remaining: (E per attempt) + - 0 - END detailed view oDegrees ' Radians 1/0 BACKSPA1 D CLEAR Submit Hint Feedback I give up! Hints: 0% deduction per hint. Hints remaining: l Feedback: 1 % deduction per feedback

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