A 120−kg object and a 420−kg object are separated by 4.10 m. (a) Find the magnitude of the net gravitational force exerted by these objects on a 46.0−kg object placed midway between them. N (b) At what position (other than an infinitely remote one) can the 46.0−kg object be placed so as to experience a net force of zero from the other two objects? m from the 420 kg mass toward the 120 kg mass