HSC space question (2 Viewers)

[duhdevitt]

how would you do this question, like I don't know what to do. There was a lot of similar questions and I'm legit so lost aha. help pleZ


rexona <3

 

[SquareHeartsAdrita]

D) because of the formula f = Gm1m1/d^2

 

[duhdevitt]

D) because of the formula f = Gm1m1/d^2

how do you get the answer from that equation?


rexona <3

 

[SquareHeartsAdrita]

how do you get the answer from that equation?


rexona <3

ratio of when it was at d then d/2

so the formula becomes 1^2/0.5^2 = 4

 

[duhdevitt]

ratio of when it was at d then d/2

so the formula becomes 1^2/0.5^2 = 4

I legit still don't get it,


rexona

 

[duhdevitt]

ratio of when it was at d then d/2

so the formula becomes 1^2/0.5^2 = 4

How did you get those values


rexona <3

 

[SquareHeartsAdrita]

How did you get those values


rexona <3

not sure if srs

d = 1

d/2 = 1/2

 

[duhdevitt]

not sure if srs

d = 1

d/2 = 1/2

oh ok I didn't knew d/2 was half aha. Soz I just started space and this was homework so I was pretty lost. Thanks soo much


rexona <3

 

[SquareHeartsAdrita]

oh ok I didn't knew d/2 was half aha. Soz I just started space and this was homework so I was pretty lost. Thanks soo much


rexona <3

yeah you definitely need more practice but don't worry; you have one year from now

 

[duhdevitt]

yeah you definitely need more practice but don't worry; you have one year from now

Thanks,


rexona <3

 

[Rajiv321]

I know this is an old post but ima reply anyways.
You know you need gravitational force.
Gravitational force is inversely proportional to the square of the distance so therefore, at a distance of lets say 2x the force will be f/4 (2^2). if it was 3x it would be f/9, at distance r/2 it will be inverse of 1/2^2 (1/4) which is equal to 4.