If m is 5.00 kg and r is 20.0 cm, calculate the magnitude and direction of the net gravitational force acting on the ball with the mass of 4m in case 2. define the positive direction as pointing to the right, so your answer should have a positive sign if the net force is directed right, and a negative sign if the net force is directed left. note that a number such as 1.23 x 10^-9 can be entered as 1.23e-9 n