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, Point A). 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 the class. If the head weighs 43 N, calculate the force exerted by the muscles FM using the information in the figure. Assume that x₁ = 4.9 cm, x₂ = 2.3 cm, and Fw| = 43 N. FM = What is the force Fj exerted by the pivot on the head? F₁ = N N
Rotational Equilibrium And Rotational Dynamics
In physics, the state of balance between the forces and the dynamics of motion is called the equilibrium state. The balance between various forces acting on a system in a rotational motion is called rotational equilibrium or rotational dynamics.
Equilibrium of Forces
The tension created on one body during push or pull is known as force.
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-ocipital joint, Point A). 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 the class.
If the head weighs 43 N, calculate the force exerted by the muscles, Fm, using the information in the figure. Assume that x1= 4.9 cm, X2= 2.3 cm, and |Fw|= 43 N.
A) Fm= ?? N
B) What is the force, Fj, exerted by the pivot on the head?
Step by step
Solved in 3 steps with 1 images
