Question

Any body can ans it in 10 min

Answer 1

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Answer 2

 A ------ 5 m -------- B -------- 5m -------- C

Ma = 10 kg           Mb = 20 kg               Mc = 30 kg

Net gravitational force Fa on A is towards right side.

      Fa = G Ma Mb / 5²  + G Ma Mc / 10²

           = 6.67 * 10⁻¹¹ * 10 [ 20/ 5² + 30 /1 00]  N

           = 7.34 * 10^-10 N 

Net gravitational force Fc on C is towards B, left side and its magnitude is equal to Fa ie., 7.34 * 10^-10 N

Net gravitational force on B is Fb & is towards C

    Fb = G Mb [ Mc - Ma ]/ 5²

          = 6.67 * 10⁻¹¹ * 20 * 20 * 4  = 1.07 * 10^-7N