if an object is actually tied up with string and it feels a pulling effect by the string then this pulling effect cause the centtri.. acceleration but object preciev gravity in opposite direction ?? and does centri... acceleration equal to the acc due to gravity ?? thnx :D

Question

if an object is actually tied up with string and it feels a pulling effect by the string then this pulling effect cause the centtri.. acceleration but object preciev gravity in opposite direction ?? and does centri... acceleration equal to the acc due to gravity ?? thnx  :D

anonymous · Answer

predetor, can you be more specific with your first question? It seems like you're asking "Is the acceleration of an object felt in the opposite direction as gravity" The answer to this is no, the force of the acceleration of the object is always pointed toward the center of the rotation. Centripetal acceleration's force does not always equal gravity. However if you were to rotate a bucket of water around and around, you would need to exert a force equal to or greater than gravity in order for the water to stay in the bucket. Watch this: http://ocw.mit.edu/courses/physics/8-01-physics-i-classical-mechanics-fall-1999/video-lectures/lecture-5/ about 40 minutes in there is a demonstration