The quadriceps tendon attaches to the tibia at a 30° angle 4 cm from the joint center at the knee. When an 80 N weight is attached to the ankle 28 cm from the knee joint, how much force is required of the quadriceps to maintain the leg in a horizontal position? When the subject mass is 75 kg, what is the magnitude and direction of the reaction force exerted by the femur on the tibia? (Utilize “Foot and leg” in the included chart to obtain weight of the lower leg and location of COM. Neglect the action of other muscles.)
The quadriceps tendon attaches to the tibia at a 30° angle 4 cm from the joint center at the knee. When an 80 N weight is attached to the ankle 28 cm from the knee joint, how much force is required of the quadriceps to maintain the leg in a horizontal position? When the subject mass is 75 kg, what is the magnitude and direction of the reaction force exerted by the femur on the tibia? (Utilize “Foot and leg” in the included chart to obtain weight of the lower leg and location of COM. Neglect the action of other muscles.)
International Edition---engineering Mechanics: Statics, 4th Edition
4th Edition
ISBN:9781305501607
Author:Andrew Pytel And Jaan Kiusalaas
Publisher:Andrew Pytel And Jaan Kiusalaas
Chapter1: Introduction To Statics
Section: Chapter Questions
Problem 1.12P: A differential equation encountered in the vibration of beams is d4ydx4=2D where x = distance...
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The quadriceps tendon attaches to the tibia at a 30° angle 4 cm from the joint center at the knee. When an 80 N weight is attached to the ankle 28 cm from the knee joint, how much force is required of the quadriceps to maintain the leg in a horizontal position? When the subject mass is 75 kg, what is the magnitude and direction of the reaction force exerted by the femur on the tibia? (Utilize “Foot and leg” in the included chart to obtain weight of the lower leg and location of COM. Neglect the action of other muscles.)
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