Ques6....

Ques6.... Fth lite. o told m West remains eight ,OOO km 'tes : ;ources. Planetary n elliptical n and the su0RT ANSWER TYPE . Give two characteristics 16. and earth pull 17. for to earth List one difference and one similarity 18. Wh betweenryetional and inertial 4. What are affec ing the value S. The mass of two bodies are doubled and the distance is halved. how 'ill the artificial satellite is at a height of 3.500 km above earth's surface. is the work done by earth's gravitational force in keeping it in its orbit ? (KI'S 20081 7. Give the S.L units of •g' and 'G'. S. Show graphically how g varies as you move from the centre of earth to great heights above the surface. 9. miat is the height at which the value of g is the same as at a depth ofW2 ? 10. WIIat is the gravitational potential at infinity ? at is the height at whith the is be parked 19. What is the for the 20. Why does a person in a satellite feel 21. is parking Orbit 7 22. What is the gravitational field at a 23. How the gravitational field at a inside a solid sphere vary with x from its centre, if R ani (R.radius) ? 24. What does spring balance me Mass or Weight ? 25. What is the value of escape vel the surface of (O earth, (ill m 26. What is the reason for ab atmosphere in some planets 27. As a spacecraft moves fro raoon. how does its wei#lt

Since, the gravitational force on the satellite by the planet is perpendicular at every instant of motion of the satellite, the displacement at any instant is thus perpendicular to the gravitational force. So, no work is done by the gravitational force when the satellite covers half of orbit.

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