Marco rolls one marble across a carpeted floor and another across a smooth wood floor. If the marbles are the same and he rolls them in the same way, which marble will roll farther? Why? Think of your best explanation, then read ours below.
The marble on a wood floor will roll farther because that floor offers less rolling resistance. On a carpeted floor, the marble rolls over carpet fibers, bending them. This resists the marble's motion because the marble uses some form of its energy to move the fibers.
By: Pierre Collet-Derby