関連ワード:  the work done by the frictional force on a surface in drawing a circle of radius r    the work done by the frictional force on a surface in drawing a circle    the work done by the frictional force on a surface    the work done by the frictional force on a surface in drawing    the work done against the frictional force on a surface    the work done by frictional force on an object moving on a rough surface is    the work done on an object by the frictional force when it is dragged through a level surface    what is the work done by frictional force    how does friction affect work done    what is the work done by friction  
結果 : the work done by the frictional force on a surface