Search results
Results From The WOW.Com Content Network
In physics, a body force is a force that acts throughout the volume of a body. [1] Forces due to gravity, electric fields and magnetic fields are examples of body forces. Body forces contrast with contact forces or surface forces which are exerted to the surface of an object. Fictitious forces such as the centrifugal force, Euler force, and the ...
The forces acting on a body add as vectors, and so the total force on a body depends upon both the magnitudes and the directions of the individual forces. [ 23 ] : 58 When the net force on a body is equal to zero, then by Newton's second law, the body does not accelerate, and it is said to be in mechanical equilibrium .
where b is the force acting on the body per unit mass (dimensions of acceleration, misleadingly called the "body force"), and dm = ρ dV is an infinitesimal mass element of the body. Body forces and contact forces acting on the body lead to corresponding moments of those forces relative to a given point. Thus, the total applied torque M about ...
A large civil police force organised and trained along military lines, which may contain paramilitary elements. This is the usual definition in places outside Great Britain such as the former Royal Irish Constabulary , the former Royal Ulster Constabulary [ citation needed ] , Royal Newfoundland Constabulary , Jamaica Constabulary Force .
Human gait is defined as bipedal forward propulsion of the center of gravity of the human body, in which there are sinuous movements of different segments of the body with little energy spent. Various gaits are characterized by differences in limb movement patterns, overall velocity, forces, kinetic and potential energy cycles, and changes in ...
Early experiments showed that adrenaline increases twitch, but not tetanic force and rate of force development in muscles. [38]One proposed explanation is Tim Noakes' "central governor" theory, which states that higher instances in the central nervous system dynamically and subconsciously control the number of active motor units in the muscle.
Exertion requires, of the body, modified oxygen uptake, increased heart rate, and autonomic monitoring of blood lactate concentrations. Mediators of physical exertion include cardio-respiratory and musculoskeletal strength, as well as metabolic capability. [4] This often correlates to an output of force followed by a refractory period of ...
In biomechanics, center of pressure (CoP) is the term given to the point of application of the ground reaction force vector. The ground reaction force vector represents the sum of all forces acting between a physical object and its supporting surface. Analysis of the center of pressure is common in studies on human postural control and gait.