Question

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.

Answer 1

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

Answer 2

i think it will move tangentially and then escape away

Answer 3

why?

Answer 4

momentum

Answer 5

because nothing is holding it back now.

Answer 6

but answer is showing is option c

Answer 7

uhm I would disagree with that answer.

Answer 8

so answer is wrong

Answer 9

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

Answer 10

is it a geo-stationary orbit initially

Answer 11

what it means is it a geo-stationary orbit initially

Answer 12

http://en.wikipedia.org/wiki/Geostationary_orbit

Answer 13

in simple def.

Answer 14

the object orbits as the planet turns

Answer 15

ok

Answer 16

in what case option a) satisfies

Answer 17

object orbits becoz of gravity of earth

Answer 18

ok

Answer 19

so in what case option c satisfies

Answer 20

geostationary means the object orbital period is same as earth rotation

Answer 21

thnx.. @sara12345

Answer 22

in what case option c satisfies

Answer 23

plz tell me

Answer 24

i think so

Answer 25

@sauravshakya

Answer 26

i mean b is right

Answer 27

ok

Answer 28

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

Answer 29

it never satisfies

Answer 30

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

Answer 31

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

Answer 32

why? if gravity becomes zero at all the objects

Answer 33

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

Answer 34

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

Answer 35

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

Answer 36

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

Answer 37

no that i didnt say, u r not listening properly

Answer 38

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

Answer 39

means it would fall on that object

Answer 40

@sara12345 @Coolsector is right?

Answer 41

lol i dont need her approval anyway

Answer 42

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

Answer 43

i didnt say that

Answer 44

i dont think she said it

Answer 45

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

Answer 46

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

Answer 47

oh!! sry...

Answer 48

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

Answer 49

in what case option d satisfies

Answer 50

a stationary object case is false

Answer 51

ok

Answer 52

in case of option d

Answer 53

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

Answer 54

oh!! k

Answer 55

or the speed is not high enough

Answer 56

so final answer would be

Answer 57

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

Answer 58

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