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Manipal MET2018PhysicsGravitation

A research satellite of mass 200 kg circle the earth in an orbit of average radius 3 R 2 , where R is the radius of the earth. Assuming the gravitational pull on a mass of 1 kg on the earth's surface to be 10 N , the pull on the satellite will be

Options

  1. A880 N
  2. B889 N
  3. C890 N
  4. D892 N

Correct answer

B. 889 N

Step-by-step solution

Given, ( aligned & 10= G 6 10²⁴ 1 (6.4 10^6 )^2 & G=6.82 10⁻¹¹ Nm ^2 / kg ^2 aligned ) Therefore, (F_ satellite = 6.82 10⁻¹¹ 6 10²⁴ 200 ( 3 6.4 10^6 2 )^2 =889 ~N )

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