Question 6 (1 point) Over 95% of the joints found in the human body form ____ class levers, which are characterized by disadvantage in force but advantage in motion (displacement or velocity). 1st 2nd 3rd
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Step 1: Levers are classified into three classes based on the relative positions of the fulcrum, effort, and load. Show more…
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An individual performing calf raises, rising onto the balls of their feet and then lowering their heels, is an example of what class lever? 1st class 2nd class 3rd class 2. An individual performing overhead triceps extensions with a 5kg dumbbell is an example of what class lever? 1st class 2nd class 3rd class 3. A gym-goer is holding a dumbbell statically while he snaps a quick selfie in the mirror. Here is what you know: Elbow flexion angle = 90° The torque generated at the elbow due to the force of the biceps = 78.48 Nm Moment arm of the biceps = 2 cm External resistance = 20 kg Distance from the elbow joint center to the external resistance = 40 cm Note: Not all the information provided is necessary to answer the question below. However, we will revisit the gym-goer scenario in the coming weeks as we learn more about the concepts and applications of angular kinetics. What class lever is this system? 1st class 2nd class 3rd class
Adi S.
If L = load, F = fulcrum, and E = effort, what type of lever system is described as L-E-F? Third-class lever Second-class lever Fourth-class lever First-class lever
Anand J.
A. Which of these classes of levers will always require a greater effort force than the load force in order to maintain static equilibrium? B. Suppose your load is 200 N at a distance of 4 meters from the fulcrum. What effort force is needed to balance this if it is placed at a distance of 15 meters from the fulcrum?
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