1 NDRRMC PDRA Core Group led by Executive Director USEC Alexander Pama went to Albay Province. 2  A meeting was held at Handyong Hall, OCD V Building, Camp Ola, Legazpi City to discuss the concerns of the PDRRMC along with the LGUs and Response Agencies in connection with the Mayon Operations.
â¢ The centripetal acceleration vector points toward the center of the circle, BUT the velocity vector always points in the direction of the motion (tangent to the circular path). In uniform circular motion, Velocity and centripetal acceleration are always perpendicular to each other.
The explanation for retrograde motion in a heliocentric model is that retrograde occurs roughly when a faster moving planet catches up to and passes a slower moving planet. How the planet Mars would appear to have both prograde then retrograde then prograde motion is shown in the diagram below. Notice that it is all due to the fact that the Earth moves faster in its orbit than does Mars.