Lesson Plan #29 http://www.phy6.org/stargaze/Lcircul.htm . A short but important section, deriving centripetal acceleration for motion at constant speed around a circle. ... That the "centripetal acceleration" of an object going around a circle of radius R with constant speed v equals v 2 /r and is directed towards the center of the motion. ... Terms: uniform circular motion, frequency, peripheral velocity, centripetal acceleration and force. ... A newer one An older one Timeline Glossary . ...