please answer to question a and b step by step. Have no clue to how solve it oex

Question

please answer to question a and b step by step. Have no clue to how solve it

oexamisolutions15S.pot × Y Quiz #1 Math 1920 Calculus II × Y Assignment 5 A 0.67 Kg Person Stands On A X CSecure https://www.webassign.net/web/Student/Assignment-Responses/last?dep-19480261 Apps RFacebook YouTube Translate a Amazon 'myPellissippi Login Pellissippi State Co.- 5) Other Bookmarks t submission is used for your 1. -12 points YFWA14 11.P012 My Notes Ask Your Even when the head is held erect, as in the figure below, its center of mass is not directly over the principal point of support the atlanto-occipital joint). The muscles in te back of the neck must therefore exert a force to keep it erect. That is why your head falls forward when you fall asleep in class. If the perpendicular distance between the line of action for the weight of the head and the pivot point is rWL = 2.0 cm and the perpendicular distance between the line of action for the force the muscles exert on the head and the pivot point is rM 5.2 cm, determine each of the following. (Assume the weight of the head is 50 N.) CG (a) the force exerted by these muscles (b) the force on the point of support 2. -12 points YFWA14 11.P.004. My NotesAsk Your Te

Explanation / Answer

Solution,

A)

Net torque about any point would be zero.

Considering net torque about the pivot,

Fore exeterted by muscles of the back of the neck,

(F_muscle x 5.2) – (50 x 2) = 0

F_muscle = 19.23 N

B)

Now F_J = F_muscle + F_head

F_J = = 19.23 + 50 = 69.23 N

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