A155-kg object and a 455-kg object are separated by 4.30 m. (a) find the magnitude of the net gravitational force exerted by these objects on a 42.0-kg object placed midway between them. -1.8e-7 n (b) at what position (other than an infinitely remote one) can the 42.0-kg object be placed so as to experience a net force of zero from the other two objects? 1.586 m from the 455 kg mass toward the 155 kg mass