9th Class Science Sample Paper Science Olympiad Model Test Paper-21

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

    A) \[KMn{{O}_{4}}\]

    B) \[4.80\times {{10}^{-11}}N,\text{ 3}.73\times {{10}^{-11}}N,\text{ 8}.28\times {{10}^{-13}}N\]

    C) \[5.20\times {{10}^{-12}}N,\text{ 7}.63\times {{10}^{-11}}N,\text{ 6}.23\times {{10}^{-11}}N\]

    D) \[2.13\times {{10}^{-11}}N,\text{ 4}.80\times {{10}^{-11}}N,\text{ 6}.52\times {{10}^{-12}}N\]

    E) None of these

    Correct Answer: A

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