The force required to move an object (piano)

[ebineezer]

TL;DR

Hi, I'm working on a kinetic sculpture, rotating a piano 360 degrees within a circular framework. The piano has 2 pulley type wheels on each corner which fit into the round rails to maintain stability. My question--is the force needed to push/pull the piano on flat horizontal rails the same as it is to rotate it on round rails? Consider the piano to be balanced.

 

[AZFIREBALL]

Assuming there is no binding in the track and the track is relatively hard material, smooth and clean(there will be some rolling resistance)...the force needed is that necessary to overcame friction in the bearings(wheels) supporting the weight of the object.