3. Objects with masses of 0.2 kg and 0.3 kg are separated by 0.15 m. A third object of mass 0.05 kg is placed between them on the line joining the first two objects. a) Find the net gravitational attraction force exerted on the third object if it is placed 0.05 m from the 0.3 kg mass. [3.35x10-N]
b) At what position along the line the third object should be placed for no net gravitational force exerted it. [6.7 cm]​