A) What size Force does the femur exert on the kneecap if the tendons are orient

Question

A) What size Force does the femur exert on the kneecap if the tendons are oriented as in the figure and the tension is 51N? Assume your knee is stationary and that the weight of the patella itself is negligible. MasteringPhysics: Homework #5-Google Chrome Secure : https://session.masteringphysics.com/myct/itemView?assignmentProble Homework#5 Problem 5.5-MC Problem 5.5- MC Part A When you bend your knee, the quadriceps muscle is stretched. This increases the tension in the quadriceps tendon attached to your kneecap (patella), which, in turn, increases the tension in the patella tendon that attaches your kneecap to your lower leg bone (tibia). Simultaneously, the end of your upper leg bone (femur) pushes outward on the patella. The figure shows how these parts of a knee joint are arranged.(Figure 1) Assume yo press your an Hints FF= 41.5 N Submit My A Figure 1.- of 1 Correct Part B What is the direction c Enter the standard a > Hints Patella endon hia 0 24.0 Submit My Answ HEWL

Explanation / Answer

F(horiz) = 0
Fh = 51 cos 42 = 37.90

F(vert) = 0,
Fv = 51 - 51 sin 42 = 16.87

F = Fh² + Fv² = 37.90² + 16.87² = 41.5

TanQ = 16.87 / 37.9

Q = 24 degree

or

Q = 90 - 24 = 66 degree

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