Question

Fpa ?_{i=1}^{n} T = F_{n} * MA_{n} SOH CAH TOA Fga Fgdb The person is performing a chest fly. The DB has a mass of 15 kg. His entire upper extremity (arm, forearm, hand) combined has a mass of 8kg. The following forces have a point of application along the blue lever line from the AoR: pectoralis major 0.10m, Force of gravity on the arm 0.35m, and the dumbbell 0.7m. The pectoralis major pulls at an angle to the lever of 50°, and the lever is 20 degrees from parallel with the ground. Part 1: Draw a free body diagram representing this system. Include all required components. Part 2: What are the parallel and rotational force components of the Force of the pectoralis major? Part 3: Is Dumbbell causing a compression or distraction force on the shoulder? Part 4: He generates 900N of force with his pectoralis muscles. Is he performing a concentric, eccentric or isometric contraction?

          Fpa
?_{i=1}^{n} T = F_{n} * MA_{n}
SOH CAH TOA
Fga
Fgdb
The person is performing a chest fly. The DB has a mass
of 15 kg. His entire upper extremity (arm, forearm, hand)
combined has a mass of 8kg. The following forces have a
point of application along the blue lever line from the
AoR: pectoralis major 0.10m, Force of gravity on the arm
0.35m, and the dumbbell 0.7m. The pectoralis major
pulls at an angle to the lever of 50°, and the lever is 20
degrees from parallel with the ground.
Part 1: Draw a free body diagram representing this
system. Include all required components.
Part 2: What are the parallel and rotational force
components of the Force of the pectoralis major?
Part 3: Is Dumbbell causing a compression or distraction
force on the shoulder?
Part 4: He generates 900N of force with his pectoralis
muscles. Is he performing a concentric, eccentric or
isometric contraction?

Fpa
?i=1^n T = Fn * MAn
SOH CAH TOA
Fga
Fgdb
The person is performing a chest fly. The DB has a mass
of 15 kg. His entire upper extremity (arm, forearm, hand)
combined has a mass of 8kg. The following forces have a
point of application along the blue lever line from the
AoR: pectoralis major 0.10m, Force of gravity on the arm
0.35m, and the dumbbell 0.7m. The pectoralis major
pulls at an angle to the lever of 50°, and the lever is 20
degrees from parallel with the ground.
Part 1: Draw a free body diagram representing this
system. Include all required components.
Part 2: What are the parallel and rotational force
components of the Force of the pectoralis major?
Part 3: Is Dumbbell causing a compression or distraction
force on the shoulder?
Part 4: He generates 900N of force with his pectoralis
muscles. Is he performing a concentric, eccentric or
isometric contraction?

Added by Carolyn M.

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