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Solved: BIO Neck Muscles. A student bends her head at
Chapter 11, Problem 23E(choose chapter or problem)
BIO A Good Workout. You are doing exercises on a Nautilus machine in a gym to strengthen your deltoid (shoulder) muscles. Your arms are raised vertically and can pivot around the shoulder joint, and you grasp the cable of the machine in your hand \(64.0 \mathrm{~cm}\) from your shoulder joint. The deltoid muscle is attached to the humerus \(15.0 \mathrm{~cm}\) from the shoulder joint and makes a \(12.0^{\circ}\) angle with that bone (Fig. E11.22). If you have set the tension in the cable of the machine to \(36.0 \mathrm{~N}\) on each arm, what is the tension in each deltoid muscle if you simply hold your outstretched arms in place? (Hint: Start by making a clear free-body diagram of your arm.)
Equation Transcription:
°
°
Text Transcription:
64.0 cm
15.0 cm
12.0^circ
36.0 N
125^circ
Questions & Answers
QUESTION:
BIO A Good Workout. You are doing exercises on a Nautilus machine in a gym to strengthen your deltoid (shoulder) muscles. Your arms are raised vertically and can pivot around the shoulder joint, and you grasp the cable of the machine in your hand \(64.0 \mathrm{~cm}\) from your shoulder joint. The deltoid muscle is attached to the humerus \(15.0 \mathrm{~cm}\) from the shoulder joint and makes a \(12.0^{\circ}\) angle with that bone (Fig. E11.22). If you have set the tension in the cable of the machine to \(36.0 \mathrm{~N}\) on each arm, what is the tension in each deltoid muscle if you simply hold your outstretched arms in place? (Hint: Start by making a clear free-body diagram of your arm.)
Equation Transcription:
°
°
Text Transcription:
64.0 cm
15.0 cm
12.0^circ
36.0 N
125^circ
ANSWER:
Solution to 23E
Step 1 of 3
Free body diagram
