Three balls P, Q and R are kept in a straight line. The separation between P and R is 1m, and Q is placed at the midpoint between them. The masses of P, Q, R are 200 g, 300 g and 400 g respectively. Find the net gravitational force on P, Q and R respectively.

• A. \[2.13\times {{10}^{-11}}N,\,4.80\times {{10}^{-11}}N,\,3.73\times {{10}^{-11}}N\]
• B. \[4.80\times {{10}^{-11}}N,\,3.73\times {{10}^{-11}}N,\,8.28\times {{10}^{-13}}N\]
• C. \[5.20\times {{10}^{-12}}N,\,7.63\times {{10}^{-11}}N,\,6.23\times {{10}^{-11}}N\]
• D. \[2.13\times {{10}^{-11}}N,\,4.80\times {{10}^{-11}}N,\,6.52\times {{10}^{-12}}N\]
• E. None of these