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circular motion

 * circulation motion-the movement of an object with a constant speed around the circle with fixed radius**
 * axis- straight line around which rotation takes place**
 * rotation-object turns around an internal axis**
 * revolution-object turns around an external axis**

**ROTATION SPEED**

 * linear speed- distance/time**
 * tangenital speed- speed along path**

gravity
 * newton believed gravitation forces were responsible for the acceleration of objects on the moon and earth.
 * newton reasoned that if the cannon rejected the cannonball with exactly the the right velocity.
 * he concluded that any two objects in the universe exec gravitational attraction on each other.

universal gravitation and mass

 * as the mass of either objects or both objects increased the force of gravitational attraction increases.

**Universal Gravitation and Distance**

 * **as the distance is separating two objects increased**

Coloums law

 * relationship among electrical forces charges and distance. its like Newtons law of gravity. But unlike electronic forces be attractive or repulsive.[[image:http://www.lennoxfinancial.com/fmla1.gif width="269" height="115" caption="http://www.lennoxfinancial.com/fmla1.gif"]]

Rotation Speed

 * Linear Speed= distance/time
 * tangential speed speed along a circular path
 * Ex Carousel horses travel at same rotation speed but difference tangential speed.