Educator

In physics, the concept of force is used to describe how a mass is affected, be it in form of acceleration or mechanical stress.[1]. Force can also be described by intuitive concepts such as a push or pull that can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate, or which can cause a flexible object to deform. Thrust is any force which increases the velocity of the object. Drag is any force which decreases the velocity of any object. The tendency of a force to cause changes in rotational speed about an axis is called torque.Mechanical stress is a technical term for the efforts which cause deformation of matter, be it a solid, liquid, or gaseous. Mechanical stress can remain embedded in a solid object, gradually deforming it. Mechanical stress in a fluid determines changes in its pressure and volume