Acceleration 07
Acceleration 07 : Natural Disaster. The rate of change with time of speed and / or velocity; strictly, the rate of change with time of the velocity vector of a particle. If V is the velocity, the acceleration may be written as dV/dt, where d/dt is the total derivative. In two-dimensional motion the acceleration may be decomposed, in natural coordinates, into the tangential acceleration along the streamline and the centripetal acceleration normal to the streamline: dt dt R where V is the magnitude of V, t a unit vector along V, R the instantaneous radius of curvature of the path, and n a unit vector normal to V, in the direction of the center of curvature. For most purposes in hydrodynamics where Eulerian coordinates are employed, the acceleration is decomposed as follows: dv =
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