Jenifurr,+Oscuhh

= =

=circulation motion=
 * the movement of an object at a constant speed around a cirlcle with fixed radious.
 * Axis- a straight line around with rotation takes place.
 * Rotation- object that turns around an internal axis.
 * Ex: ice skater.**
 * Revolution- object that turns in around an external axis.
 * Ex:earth around the the sun.**
 * rotational speed
 * linear speed distance time
 * tangential speed speed along acirca path
 * rotational speed the # of rotations per unit of time
 * Ex: Carovsel horses travel at same rotational**
 * speed but different tangential speed
 * tangential speed is radial distance times the rotational speed
 * centripetal force force that cause an object to follow a circular path example force holding occupants safely in a rotating carnival ride
 * centripetal acceleration always points toward the center of the circular motion
 * period time needed for an object to make one complete revolution
 * Distance traveld circumference
 * circumference 2 revolutions distance\circumference
 * Circular Motion problems deal with particles moving in horizontal circles with uniform speed and particles moving in vertical circles under gravity.
 * A body moving at a constant speed in a straight line will continue to move in a straight line in the absence of other forces. If a force, acting in the same direction, is applied to the body, the body will accelerate.
 * If a force, acting in the reverse direction, is applied, the body will decelerate. In other words, forces acting parallel to the line of motion can only change the speed of the body.
 * In the case of circular motion, a force, acting in a direction perpendicular to that of the body, is applied to the body. The body will change direction and travel in a circle but it will continue to move at the same speed.
 * In the case of circular motion, a force, acting in a direction perpendicular to that of the body, is applied to the body. The body will change direction and travel in a circle but it will continue to move at the same speed.