If the mass of an object is crippled but the acceleration is quadrupled what is the force of change

What is the difference between electrically neutral objects and electrically charged objects

The least penetrating form of radiation is

While carrying a heavy box up the stairs,you set the box on a step and rest. then you pick up the box and carry it to the top of the stairs. describe these actions in terms of balanced and unbalanced forces acting on the box.