# Force, Uniform Circular Motion & Center of Mass

Force occurs when two objects interact with each other. Each object exerts a force on the other: a push or a pull. When the interaction between the two objects stops, then the force also disappears. This force can be separated into two categories: forces from contact and forces from action-at-a-distance. The difference between the two classifications is whether the two objects are in direct contact with each other or not. The unit of force is newton (N).

Last updated: Mar 8, 2022

Editorial responsibility: Stanley Oiseth, Lindsay Jones, Evelin Maza

Contents

## Forces and Newton’s Laws of Motion Important Forces

Forces deform objects, set them into motion, or accelerate their motion. Force is an interaction between objects that changes the energy of an object. The general equation for force is the following:

F = m a

F ⇒ force (N)
m ⇒ mass Mass Three-dimensional lesion that occupies a space within the breast Imaging of the Breast (kg)

a ⇒ acceleration (m/s2)

Different types of forces are displayed in the equations below:

## Uniform Circular Motion

In this type of motion, an object is moving along a circular path. Since the velocity is a vector, its constantly changing directions balance each other out. Thus, uniform circular motion is defined by the constant sum of velocity. For example, if someone drives a car in a circle at 50 m/h, the acceleration is constant, yet the direction constantly changes.

ω ⇒ angular velocity (1/s)
α ⇒ angular acceleration (1/s2)
n ⇒ rotational speed (1/s)
r ⇒ radius Radius The outer shorter of the two bones of the forearm, lying parallel to the ulna and partially revolving around it. Forearm: Anatomy (m)
π ⇒ Pi (approx. 3.14)

## Center of Mass

The geometric center often differs from the center of mass Mass Three-dimensional lesion that occupies a space within the breast Imaging of the Breast because the latter depends on the density (and therefore, the mass Mass Three-dimensional lesion that occupies a space within the breast Imaging of the Breast) of an object. It can be defined as the centroid of a system with any number of points of the same mass Mass Three-dimensional lesion that occupies a space within the breast Imaging of the Breast A0, A1, A2… An.

M= Center of mass Mass Three-dimensional lesion that occupies a space within the breast Imaging of the Breast, no unit

The entire weight of an object acts at its center of mass Mass Three-dimensional lesion that occupies a space within the breast Imaging of the Breast (also called centroid). The center of the mass Mass Three-dimensional lesion that occupies a space within the breast Imaging of the Breast of a human body in a standing posture, for example, lies in the hip area. However, the center of mass Mass Three-dimensional lesion that occupies a space within the breast Imaging of the Breast can change depending on the posture and motion, and in case of extreme movements, it can even be located outside the body.

The posture of a body determines the type of equilibrium Equilibrium Occurs when tumor cells survive the initial elimination attempt These cells are not able to progress, being maintained in a state of dormancy by the adaptive immune system. In this phase, tumor immunogenicity is edited, where T cells keep selectively attacking highly immunogenic tumor cells.This attack leaves other cells with less immunogenicity to potentially develop resistance to the immune response. Cancer Immunotherapy. We distinguish the following types:

• Stable equilibrium Equilibrium Occurs when tumor cells survive the initial elimination attempt These cells are not able to progress, being maintained in a state of dormancy by the adaptive immune system. In this phase, tumor immunogenicity is edited, where T cells keep selectively attacking highly immunogenic tumor cells.This attack leaves other cells with less immunogenicity to potentially develop resistance to the immune response. Cancer Immunotherapy: The body comes from the deflected state back to the original posture.
• Unstable equilibrium Equilibrium Occurs when tumor cells survive the initial elimination attempt These cells are not able to progress, being maintained in a state of dormancy by the adaptive immune system. In this phase, tumor immunogenicity is edited, where T cells keep selectively attacking highly immunogenic tumor cells.This attack leaves other cells with less immunogenicity to potentially develop resistance to the immune response. Cancer Immunotherapy: After coming back from a deflected state, the body, which had been in equilibrium Equilibrium Occurs when tumor cells survive the initial elimination attempt These cells are not able to progress, being maintained in a state of dormancy by the adaptive immune system. In this phase, tumor immunogenicity is edited, where T cells keep selectively attacking highly immunogenic tumor cells.This attack leaves other cells with less immunogenicity to potentially develop resistance to the immune response. Cancer Immunotherapy before, moves further away from the equilibrium Equilibrium Occurs when tumor cells survive the initial elimination attempt These cells are not able to progress, being maintained in a state of dormancy by the adaptive immune system. In this phase, tumor immunogenicity is edited, where T cells keep selectively attacking highly immunogenic tumor cells.This attack leaves other cells with less immunogenicity to potentially develop resistance to the immune response. Cancer Immunotherapy state.
• Neutral equilibrium Equilibrium Occurs when tumor cells survive the initial elimination attempt These cells are not able to progress, being maintained in a state of dormancy by the adaptive immune system. In this phase, tumor immunogenicity is edited, where T cells keep selectively attacking highly immunogenic tumor cells.This attack leaves other cells with less immunogenicity to potentially develop resistance to the immune response. Cancer Immunotherapy: The body takes a new weight.