Term
What is angular displacement measured in? 

Definition
Angular displacement is measured in radians. ∏ radians = 180 °C since 360°C = 2∏ 1 rad = 57.3°C angular displacement = length of arc radius 


Term
State Newtons first law of motion. 

Definition
An object will remain at rest or in a constant state of uniform motion (at a constant speed in a straight line) unless it is acted on by a circular force. 


Term
what is the difference between centripetal and centrifugal forces? 

Definition
centripetal forces are directed towards the centre of teh circle, whereas centrifugal forces are directed towards the ouytside of the circle.(away from the centre) 


Term
waht is the equation for centripetal force and therefore centripetal acceleration? 

Definition
centripetal force=mv^{2} ^{ } r centripetal acceleration = v^{2} ^{ }r 

