1. The figure below shows the normal configuration of the head with proper posture. The center of mass for the weight of the skull is labeled W and the muscles that attach to the back of the skull are labeled M. Assume all quantities are correct to 2 significant figures. M W a) Determine the mechanical advantage of the skull muscles when d₁ = 20 mm and d₂ = 26 mm. Hint: Which force on the fulcrum (rotation point) is the effort, and which is the load? Enter to 2 significant figures Mechanical Advantage: b) Improper posture and positioning of the head can lead to muscle tension headaches. If the head begins to shift forward while studying or reading, the center of mass moves further from the fulcrum or pivot point. It is a subtle change, but the figure below shows the head shifted forward. The center of mass for the weight of the skull is labeled W and the muscles that attach to the back of the skull are labeled M. Determine the new mechanical advantage of the skull muscles when d₁ = 16 mm and d₂ = 22 mm. Submit answer in two significant digits. Observer how the value changes from the first scenario.

1. The figure below shows the normal configuration of the head with proper posture. The center of mass for the weight of the skull is labeled W and the muscles that attach to the back of the skull are labeled M. Assume all quantities are correct to 2 significant figures. M W a) Determine the mechanical advantage of the skull muscles when d₁ = 20 mm and d₂ = 26 mm. Hint: Which force on the fulcrum (rotation point) is the effort, and which is the load? Enter to 2 significant figures Mechanical Advantage: b) Improper posture and positioning of the head can lead to muscle tension headaches. If the head begins to shift forward while studying or reading, the center of mass moves further from the fulcrum or pivot point. It is a subtle change, but the figure below shows the head shifted forward. The center of mass for the weight of the skull is labeled W and the muscles that attach to the back of the skull are labeled M. Determine the new mechanical advantage of the skull muscles when d₁ = 16 mm and d₂ = 22 mm. Submit answer in two significant digits. Observer how the value changes from the first scenario.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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b) Improper posture and positioning of the head can lead to muscle tension headaches. If the head
begins to shift forward while studying or reading, the center of mass moves further from the fulcrum
or pivot point. It is a subtle change, but the figure below shows the head shifted forward. The center
of mass for the weight of the skull is labeled W and the muscles that attach to the back of the skull
are labeled M. Determine the new mechanical advantage of the skull muscles when d₁ = 16 mm and
d₂ = 22 mm. Submit answer in two significant digits. Observer how the value changes from the first
scenario.
Enter to 2 significant figures
Mechanical Advantage:
c) The load force is the
M
strain on the support muscles.
◆ As MA decreases, the
W
◆ and the effort force is the
increases leading to
Hint: Think about the change in mechanical advantage from question 1 to question 2. How do you
think this contributes to muscle tension headaches?

1. The figure below shows the normal configuration of the head with proper posture. The center of
mass for the weight of the skull is labeled W and the muscles that attach to the back of the skull are
labeled M.
Assume all quantities are correct to 2 significant figures.
M
W
a) Determine the mechanical advantage of the skull muscles when d₁ 20 mm and d₂ = 26 mm.
Hint: Which force on the fulcrum (rotation point) is the effort, and which is the load?
Enter to 2 significant figures
Mechanical Advantage:
b) Improper posture and positioning of the head can lead to muscle tension headaches. If the head
begins to shift forward while studying or reading, the center of mass moves further from the fulcrum
or pivot point. It is a subtle change, but the figure below shows the head shifted forward. The center
of mass for the weight of the skull is labeled W and the muscles that attach to the back of the skull
are labeled M. Determine the new mechanical advantage of the skull muscles when d₁ = 16 mm and
d₂ = 22 mm. Submit answer in two significant digits. Observer how the value changes from the first
scenario.

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