## mayankdevnani 3 years ago If suddenly the gravitational force of attraction between earth and a satellite revolving around it becomes zero,then the satellite will: a)continue to move in its orbit with same velocity. b)move tangentially and escape away. c)become stationary in its orbit. d)move towards the earth.

1. mayankdevnani

@amistre64 @igbasallote @UnkleRhaukus @hartnn @Zarkon @.Sam. @bahrom7893 @cwrw238

2. bahrom7893

i think it will move tangentially and then escape away

3. mayankdevnani

why?

4. UnkleRhaukus

momentum

5. bahrom7893

because nothing is holding it back now.

6. mayankdevnani

but answer is showing is option c

7. bahrom7893

uhm I would disagree with that answer.

8. mayankdevnani

so answer is wrong

9. bahrom7893

if anyone else can prove why option C is correct, please do.

10. UnkleRhaukus

is it a geo-stationary orbit initially

11. mayankdevnani

what it means is it a geo-stationary orbit initially

12. UnkleRhaukus
13. mayankdevnani

in simple def.

14. UnkleRhaukus

the object orbits as the planet turns

15. mayankdevnani

ok

16. mayankdevnani

in what case option a) satisfies

17. sara12345

object orbits becoz of gravity of earth

18. mayankdevnani

ok

19. mayankdevnani

so in what case option c satisfies

20. sara12345

geostationary means the object orbital period is same as earth rotation

21. mayankdevnani

thnx.. @sara12345

22. mayankdevnani

in what case option c satisfies

23. mayankdevnani

plz tell me

24. sara12345

i think so

25. mayankdevnani

@sauravshakya

26. sara12345

i mean b is right

27. mayankdevnani

ok

28. mayankdevnani

but answer my question fast. in what case option c satisfies

29. sara12345

it never satisfies

30. Coolsector

the answer to this question is b)move tangentially and escape away. since the velocity of the satellite is always tangent to the path for case c .. somehow the velocity of the satellite have to become zero as well as no gravity then it stops

31. sara12345

if the object is stationary initially, it would fall on earth there and then itself

32. mayankdevnani

why? if gravity becomes zero at all the objects

33. sara12345

for gravity to become 0 suddenly, it has to exist first

34. sara12345

when gravity + stationary object are there, the object would fall

35. sara12345

the object wouldnt fall as long as it revolves around the earth

36. mayankdevnani

ok you say that whaen gravity is zero it would fall on earth there and then itself

37. sara12345

no that i didnt say, u r not listening properly

38. Coolsector

if the satellite has no speed and there is no force (like gravity) acting upon it it stands still.. so for case c to happen you need to have no gravity + zero speed

39. mayankdevnani

means it would fall on that object

40. mayankdevnani

@sara12345 @Coolsector is right?

41. Coolsector

lol i dont need her approval anyway

42. mayankdevnani

but she said when gravity is zero it would fall on that object

43. sara12345

i didnt say that

44. Coolsector

i dont think she said it

45. sara12345

i said this : when gravity + stationary object are there, the object would fall

46. sara12345

we see the transition time, when we say the gravity is becoming 0 => gravity existed before

47. mayankdevnani

oh!! sry...

48. sara12345

if gravity existed before, and therez a stationary object sitting there, it cannot sit there, it has to fall

49. mayankdevnani

in what case option d satisfies

50. sara12345

a stationary object case is false

51. mayankdevnani

ok

52. mayankdevnani

in case of option d

53. Coolsector

d might happen when there is gravity but no speed for example .. then the satellite falls

54. mayankdevnani

oh!! k

55. Coolsector

or the speed is not high enough

56. mayankdevnani

so final answer would be

57. Coolsector

we said : the answer to your question is b)move tangentially and escape away.

58. mayankdevnani

thnx... @UnkleRhaukus @sara12345 @Coolsector @bahrom7893

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