text: Force = mass times weight.  On earth the mass is constant, because the gravitational pull is constant.\n\nSo the amount of force needed to move an object that is at rest, depends upon the mass.  In other words the heavier the object, the more force needed begin motion.\n\nHOWEVER!.....there is one more factor that is neglected by the above equation.  Newton, tended to do that, most of his laws only apply in a vacuum and on frictionless condition.\n\nThat other factor is the coefficient or friction.\nOn ice its low...and take less force to set an object into motion.\nOn sand paper the coefficient is high!\n\nRECAP!\nHeavier objects on rougher (higher coefficient of friction) surfaces are more difficult to set into motion.\n\nGOOD LUCK!