"bead sliding on the uniformly rotating frictionless wire in free space" is the standard problem solved in Goldstein's classical mechanics book. The bead moves in outward direction (a=rω2) still why it is called as centripetal acceleration and not centrifugal?
Hi,
centripetal force on the planet due to sun's gravitation is balanced by centrifugal force due to planets rotation. That is why planets are stable in their respective orbits.
PS: are you from CNU daejeon, south korea?