Si se tienen dos esferas del mismo tamaño, pero de diferente material (una de icopor y la otra de metal) rodando sobre una superficie con la misma velocidad. ¿a cuál de las 2 esferas es necesario aplicar más fuerza para poderla detener al mismo tiempo?. Explique por qué

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.