Equilibrium in the Human Body using Torque

In summary, the conversation discussed the force required for Arnold Schwarzenegger to lift someone off the ground in the movie Terminator, based on his anatomy and the weight of the person being lifted. Using a torque calculation, it was determined that each of his deltoid muscles would need to exert a force of approximately 12.386 kN to perform this task.
  • #1
kemcco1955
3
0
In the movie Terminator, Arnold Schwarzenegger lifts someone up by the neck and, with both arms fully extended and horizontal, holds the person off the ground. If the person being held weighs 650 N, is 60 cm from the shoulder joint, and Arnold has an anatomy analogous to that in the figure below, what force must each of the deltoid muscles exert to perform this task? [Hint: The weight of the arm is 30.0 N and its center of gravity is at the elbow joint, 27.5 cm from the shoulder joint.]

Picture of the arm: http://s935.photobucket.com/albums/ad199/kemcco1955/?action=view&current=Physics.gif&newest=1

So far:Torque = Fm(sin15)(.12) - (650)(.6) - (30)(.275)
= Fm(sin15)(.12) – 398.25
Fm = 12822.67

Torque = Fsy+(30)(.155) + (650)(.48)-Fm(sin15)(.12)
Fsy = 81.6

Fx = (12822.67)(cos15) = 12385.75
Fs^2 = (12385.75)^2 + (81.6)^2 = 12386 N = 12.386 kN
 
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  • #2
Homework? There's a separate section for that, I think.
 

FAQ: Equilibrium in the Human Body using Torque

1. What is equilibrium in the human body?

Equilibrium in the human body refers to a state of balance or stability, where all forces acting on the body are equal and there is no net movement.

2. How is torque involved in maintaining equilibrium in the human body?

Torque is the force that causes rotation around an axis. In the human body, torque is created by muscles pulling on bones, and it helps to maintain balance and stability by counteracting external forces such as gravity and friction.

3. What factors affect equilibrium in the human body?

There are several factors that can affect equilibrium in the human body, including the distribution of weight, muscle strength and coordination, and the position of the body's center of mass.

4. How does the nervous system play a role in maintaining equilibrium?

The nervous system plays a crucial role in maintaining equilibrium in the human body. It receives information from the body's sensory receptors and sends signals to the muscles to adjust and maintain balance in response to changes in external forces.

5. Can equilibrium in the human body be disrupted?

Yes, equilibrium in the human body can be disrupted by various factors such as injury, illness, or environmental conditions. Disruptions in equilibrium can lead to loss of balance and coordination, which can affect daily activities and increase the risk of accidents.

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