Hello! I know that for an object at rest, in order to move it, first STATIC FRICTION must be overcome (F= μ N), where μ is the coefficient of friction between the two surfaces. Afterwards, while the object is in motion, SLIDING FRICTION is the resisting frictional force. However, is this the same for an object with wheels? Must the same STATIC FRICTION be overcome first? And then when in motion, ROLLING FRICTION becomes the resisting force? If so, is STATIC FRICTION for an object with wheels calculated in the same manner? Essentially my question boils down to this: If you had a block weighing 100 kilos, one with wheels (assuming the weight of the wheels to be negligible) and one without, would the STATIC FRICTION at rest be the same in both cases? I'm quite rusty on my physics concepts and would appreciate any help.