(This article was translated from Japanese to English using DeepL.)
In this lecture, we will study how to formulate the equation of equilibrium.
Calculation of the equilibrium of forces
In the horizontal direction, “the magnitude of the rightward force = the magnitude of the leftward force”.
In the vertical direction, “the magnitude of the upward force = the magnitude of the downward force”.
The key is to formulate the equation like this!
When both horizontal and vertical forces are involved, as in 2), it is necessary to formulate the equation of equilibrium for each.
Let’s try one more exercise.
Incidentally, mg is the magnitude of the gravitational force, kx is the elastic force, and μ’N is the expression for the kinetic friction.
(T and N are symbols for tension force and normal force, respectively.)
In the future, the forces that you have learned so far will appear frequently.
If you have forgotten them, please review them again.
Here are the answers.
The equation of equilibrium is very important in mechanics, so make sure you understand it perfectly.
Summary of this lecture
In the next lecture, we will learn the laws of motion.