Question

While exercising, an athlete holds a position with 90° of flexion at the hip joint and 90° of flexion at the knee joint. Considering only the iliopsoas muscle group, determine the amount of force necessary to maintain this position, given the moment arm of iliopsoas = 10.5 cm from hip joint, mass of the lower extremity = 11 kg, and moment arm of CM of the lower extremity = 38 cm from the hip joint.

Name: while exercising an athlete holds a position with 90 of flexion at the hip joint and 90 of flexion at the knee joint considering only the iliopsoas muscle group determine the amount of force 19878
Uploaded: 2022-04-15T20:40:11-08:00
Duration: 1 min 16 s
Channel: Stephen Zaffke
Description: while exercising an athlete holds a position with 90 of flexion at the hip joint and 90 of flexion at the knee joint considering only the iliopsoas muscle group determine the amount of force 19878

          While exercising, an athlete holds a position with 90° of flexion at the hip joint and 90° of flexion at the knee joint. Considering only the iliopsoas muscle group, determine the amount of force necessary to maintain this position, given the moment arm of iliopsoas = 10.5 cm from hip joint, mass of the lower extremity = 11 kg, and moment arm of CM of the lower extremity = 38 cm from the hip joint.

Added by Joan S.

Biology for AP Courses

Julianne Zedalis, John Eggebrecht

Instant Answer

Solved by Expert Stephen Zaffke

04/15/2022

Step 1

The weight (force due to gravity) can be calculated using the formula: \[ \text{Weight} = \text{mass} \times \text{gravity} \] Given that the mass of the lower extremity is 11 kg and the acceleration due to gravity is approximately \( 9.81 \, \text{m/s}^2 Show more…

Show all steps

Thanks for your feedback!

While exercising, an athlete holds a position with 90° of flexion at the hip joint and 90° of flexion at the knee joint. Considering only the iliopsoas muscle group, determine the amount of force necessary to maintain this position, given the moment arm of iliopsoas = 10.5 cm from hip joint, mass of the lower extremity = 11 kg, and moment arm of CM of the lower extremity = 38 cm from the hip joint.