Aduck with a mass of 0.90 kilograms flies at a rate of 12.0 m/s. what is the kinetic energy of the duck? 130 j 5.4 j 65 j 11 j

Suppose that three astronomical objects, 1, 2, and 3 are observed to lie on a line, and the distance from object 1 to object 3 is d. object 1 has four times the mass of object 3, and seven times the mass of object 2. find the distance between objects 1 and 2 for which the net force on object 2 is zero.