An 9.00 {\rm kg} point mass and a 15.0 {\rm kg} point mass are held in place 50.0 {\rm cm} apart. A particle of mass m is released from a point between the two masses 17.0 {\rm cm} from the 9.00 {\rm kg} mass along the line connecting the two fixed masses.
Find the magnitude of the acceleration of the particle?