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5.Gravitation

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1]. Choose the correct option: i) The value of acceleration due to gravity is  maximum at  (A) the equator of the Earth .  (B) the centre of the Earth.  (C) the pole of the Earth.  (D) slightly above the surface of the  Earth. Ans)    (C) the pole of the Earth. ii) The weight of a particle at the centre of the  Earth is  (A) infinite.  (B) zero.  (C) same as that at other places.  (D) greater than at the poles. Ans)   (B) zero iii) The gravitational potential due to the Earth is minimum at  (A) the centre of the Earth.  (B) the surface of the Earth.  (C) a points inside the Earth but not at  its centre.  (D) infinite distance. Ans )   (A) the centre of the Earth. iv) The binding energy of a satellite revolving around planet in a circular orbit is 3×109 J. Its kinetic energy is  (A) 6×10⁹ J  (B) -3 ×10⁹  J  (C) -6 ×10+⁹J  (D) 3 ×10+⁹J Ans)   (D...