The two main branches of mechanics are statics and dynamics. Static mechanics is the study of forces which are required to keep a body in equilibrium. Dynamics is the study of motion itself, and the forces producing it.
Know MoreA practical example of the use of static mechanics is in architecture. It is necessary to determine all of the stresses that load-bearing supports will be subjected to in a structure. Dynamics is further divided into kinetics and kinematics. Kinetics looks at the forces which are connected to motion. Kinematics ignores the forces themselves, in favor of looking at motion only. A practical application of dynamic mechanics is mechanical engineering. The branches of mechanics are divided even further into fields, depending on what materials they are dealing with. For instance, celestial mechanics has to do the astronomical bodies.
Learn more about Motion & MechanicsThe mechanics of breathing involve the inhalation and exhalation of air into the lungs through the movement of the diaphragm muscle, according to MedlinePlus. The diaphragm contracts to expand the lungs, which draws air into them during inhalation. Then the diaphragm relaxes to reduce the size of the lungs, which forces air out of them during exhalation.
Full Answer >An object does not have a varying speed if its velocity is constant. A constant velocity implies that an object is moving in a straight line at an identical rate over time.
Full Answer >The most common equation for speed is: speed = distance / time. It can also be expressed as the time derivative of the distance traveled. Mathematically, it can be written as v = s/t, or v = (ds/dt), where speed is denoted by v, distance is denoted by s, and time is denoted by t. In case of uniform velocity, the first equation is used.
Full Answer >Forces are broadly classified into two categories: contact forces, which are required to make contact with the object in order for them to work, and action-at-a-distance forces, which can act on objects placed at a distance. Contact forces include applied force, frictional force, normal force, spring force, tension force and air resistance. Action-at-a-distance forces include gravitational force, magnetic force and electrical force.
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