If the value of g suddenly becomes……………….. = When the value of gravity doubles, the weight of the object, which is the force pulling it toward the ground, also doubles. This increased weight creates a stronger force pressing the object onto the floor.
The force of friction between the object and the floor is directly related to this increased weight. Since the object now presses down with twice the force, the frictional force resisting its movement across the floor also increases.
To move the heavy object, you need to overcome this increased friction. With the weight doubled, the frictional force likewise doubles, making it “two times more difficult” to move the heavy object across the floor because you have to counteract this stronger resistance.