Question: 2) Joint static analysis (4 marks) Refer to the schematic diagram of the knee joint provided below, where C denotes the effective centre of

2) Joint static analysis (4 marks) Refer to the schematic diagram of the knee joint provided below, where C denotes the effective centre of rotation of the knee and P is the point of insertion of the quadriceps tendon to the patella. Consider the distance between P and C to be equal to 10 cm. Quadriceps Muscle Patella (Kneecap) Patellar Tendon Tibial Tubercle Tiblia (Shinbone) Quadricep Patella Consider a 70 kg person squatting with the upper leg at an angle 0 of 30 to the vertical. The lower leg remains vertical. The length of the upper leg is 50 cm. Now answer the following questions: a) Calculate the force that needs to be exerted by the quadricep muscle to maintain the system in static equilibrium. (I marks) b) Classify the patella according to bone type (0.5 mark) c) Explain the biomechanical role of the patella in this joint (0.5 mark) d) Calculate the force exerted by the patella on the femur condyle (1 marks) e) Calculate the joint reaction force at the knee (1 marks) HINT: it's easier to compute the JRF by considering either the upper or lower leg in isolation.

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Physics Questions!

http://secure.expertsmind.com/attn_files/405_arranging_health_club_insurance_080920021.pdf Required: as part of risk management process, what are the two steps insurance company is taking while...

A person is doing leg lifts with 3.0-kg ankle weights. She is sitting in a chair with her legs bent at a right angle initially. The quadriceps muscles are attached to the patella via a tendon; the...

CANMNMM January of this year. (a) Each item will be held in a record. Describe all the data structures that must refer to these records to implement the required functionality. Describe all the...

Portray in words what transforms you would have to make to your execution to some degree (a) to accomplish this and remark on the benefits and detriments of this thought.You are approached to compose...

Suppose that R(A, B, C) is a relational schema with functional dependencies F = {A, B C, C B}. (i) Is this schema in 3NF? Explain. [2 marks] (ii) Is this schema in BCNF? Explain. [2 marks] (b)...

Briefly describe ASCII and Unicode and draw attention to any relationship between them. [3 marks] (b) Briefly explain what a Reader is in the context of reading characters from data. [3 marks] A...

ttth Suppose that the sequence of bags {Bn | n N} is recursively enumerated by the computable function e(n, x) = fn(x), [7 marks] Hence prove that the set of all recursive bags cannot be recursively...

Dance video 3-second segment dance sequence https://www.youtube.com/watch?v=TcWPiHjIExA Time stamp 1:03 to 1:06 Using knowledge from Chapters 1 and 2, discuss (12 sent.) the movements observed and...

Prolog You are approached to compose a Prolog program to work with twofold trees. Your code shouldn't depend on any library predicates and you ought to expect that the mediator is running without...

(i) Write down the linear program relaxation for the vertex cover problem and solve the linear program. [6 marks] (ii) Based on the solution of the linear program in (b)(i), derive an integer...

In the question here you want to understand zero order optimization, when you only have access to the function value f(x) instead of the gradient (thinking about Reinforcement Learning). Consider the...

1. Calculate EFN (reconciled with Income Statement) 2. Prepare a projected income statement and balance sheet for 2019 (reconciled) Cash Marketable securities Accounts receivable Inventory Total...

ok so answer these questions with the results of your findings: "What does the sign of the FX exposure tell you? Does it appear that GM is exposed to Yen fluctuations? Why might this be as GM sells...

1. Find the values of the integrals (i) S Re z dz (ii) Sa z2 dz from the point z1 = 1 to the point z2 = i in the positive direction on the following curves C: (a) the boundary of the square: 0

1. Let u and v be two harmonic functions. Prove that a linear combination au + Bv, a, B ER, is also a harmonic function. 2. Is u? a harmonic function if u is a non-constant harmonic function? Give...

7. Suppose f is analytic in a domain D such that |f| is constant in D. Then show that f is a constant in D. 8. Let f = u + iv be a non-constant function such that f = u iv be analytic in a domain D....

Construct the quarterly pro-forma statements for 1992, quarterly. Make sure that in a separate table, you show any assumptions that you have made, and in an adjacent cell, briefly justify your...

6 Theory of Machines 5. A shaft carries five masses A, B, C, D and E which revolve at the same radius in planes which are equidistant from one another. The magnitude of the masses in planes A, C and...

Which will experience the greater effective nuclear charge, the electrons in the n = 3 shell in Ar or n = 3 the shell in Kr? Which will be closer to the nucleus? Explain.

The ionic substance strontium oxide, SrO, forms from the reaction of strontium metal with molecular oxygen. The arrangement of the ions in solid SrO is analogous to that in solid NaCl (Figure 2.21):...

A solution contains 2.0 x 10-4 M Ag+ and 1.5 x 10 -3 M Pb2+ .If NaI is added, will AgI (Ksp = 8.3 x 10-17) or PbI2 (Ksp = 7.9 x 10 -9) precipitate first? Specify the concentration of 1-needed to...

A report from Texas Transportation Institute (Texas A&M University System, 2005) titled Congestion Reduction Strategies included the accompanying data on extra travel time for peak travel time in...

The National Survey on Drug Use and Health, conducted in 2006 and 2007 by the Office of Applied Studies, led to the following state estimates of the total number of people ages 12 and older who had...

The article Going Wireless (AARP Bulletin, June 2009) reported the estimated percentage of households with only wireless phone service (no land line) for the 50 U.S. states and the District of...