- 9 Problem 8 Even When The Head Is Held Erect As Shown In The Figure Its Center Of Mass Is Not Directly Over The Pr 1 (15.25 KiB) Viewed 40 times
- 9 Problem 8 Even When The Head Is Held Erect As Shown In The Figure Its Center Of Mass Is Not Directly Over The Pr 2 (53.32 KiB) Viewed 40 times
- 9 Problem 8 Even When The Head Is Held Erect As Shown In The Figure Its Center Of Mass Is Not Directly Over The Pr 3 (9.59 KiB) Viewed 40 times
- 9 Problem 8 Even When The Head Is Held Erect As Shown In The Figure Its Center Of Mass Is Not Directly Over The Pr 4 (10.47 KiB) Viewed 40 times
(9%) Problem 8: Even when the head is held erect, as shown in the figure, its center of mass is not directly over the principal point of support the atlanto-occipital joint). The muscles at the back of the neck should therefore exert a force to keep the head erect. That is why your head falls forward when you fall asleep in class.
F, CG 5.0 cm -2.5 cm w
50% Part (a) If the head has a weight of 49.9 N. calculate the force in units of newtons exerted by these muscles using the information in the figure Grade Summary FM = N Deductions 03 Potential 100%
A 50% Part (b) What is the force in newtons exerted by the pivot on the head? Fj = 1 N