AP_Physics_-_Circular_Motion

AP_Physics_-_Circular_Motion - CircularMotion...

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    Circular Motion
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Speed/Velocity in a Circle Consider an object moving in a circle around a specific origin. The DISTANCE the object covers in ONE REVOLUTION is called the CIRCUMFERENCE . The TIME that it takes to cover this distance is called the PERIOD . T r T d s circle π 2 = = Speed is the MAGNITUDE of the velocity. And while the speed may be constant, the VELOCITY is NOT. Since velocity is a vector with BOTH magnitude AND direction, we see that the direction o the velocity is ALWAYS changing. We call this velocity, TANGENTIAL velocity as its direction is draw TANGENT to the circle.
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Centripetal Acceleration meters in length arc = = s r s θ v v r vt vt s v v r s = = = = Suppose we had a circle with angle, θ, between 2 radaii. You may recall: v o v θ v v o v on accelerati l centripeta a a t v r v c c = = = 2 Centripetal means “center seeking” so that means that the acceleration points towards the CENTER of the circle
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This note was uploaded on 11/18/2011 for the course PHYS 121 taught by Professor Burgeson during the Fall '11 term at BYU.

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AP_Physics_-_Circular_Motion - CircularMotion...

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