Planets and gravity

[Ayahuasca]

How small would a planet have to be to a) ensure you didn't float off and b) allow you to chuck rocks into space with hand-generated 'exit velocity'?

[Benjaminpalma]

Ayahuasca said:

How small would a planet have to be to a) ensure you didn't float off and b) allow you to chuck rocks into space with hand-generated 'exit velocity'?

About the size of Angola.

[Ayahuasca]

Cool.

[Brother D]

Benjaminpalma said:

Ayahuasca said:

How small would a planet have to be to a) ensure you didn't float off and b) allow you to chuck rocks into space with hand-generated 'exit velocity'?

About the size of Angola.

Did you make that up...

[SystemParanoia]

Ceres should be a good bet

Edit : no .. unless you can throw rocks at half a km per sec lol

Edit 2 : Phobos is about the perfect size..

Exit velocity is 40kph, which is enough to ensure you dont float away after you throw the damn rock.

so to answer your question... the mass of the planetoid would have to be 1.072 × 1016 kg

Edited by SystemParanoia on Wednesday 2nd June 15:53

[elster]

Brother D said:

Benjaminpalma said:

Ayahuasca said:

How small would a planet have to be to a) ensure you didn't float off and b) allow you to chuck rocks into space with hand-generated 'exit velocity'?

About the size of Angola.

Did you make that up...

Yes, but he made you think.

[Ayahuasca]

SystemParanoia said:

Ceres should be a good bet

Edit : no .. unless you can throw rocks at half a km per sec lol

Edit 2 : Phobos is about the perfect size..

Exit velocity is 40kph, which is enough to ensure you dont float away after you throw the damn rock.

so to answer your question... the mass of the planetoid would have to be 1.072 × 1016 kg

Edited by SystemParanoia on Wednesday 2nd June 15:53

What, just over a ton? Seem a tad ... small?

[elster]

Ayahuasca said:

SystemParanoia said:

Ceres should be a good bet

Edit : no .. unless you can throw rocks at half a km per sec lol

Edit 2 : Phobos is about the perfect size..

Exit velocity is 40kph, which is enough to ensure you dont float away after you throw the damn rock.

so to answer your question... the mass of the planetoid would have to be 1.072 × 1016 kg

Edited by SystemParanoia on Wednesday 2nd June 15:53

What, just over a ton? Seem a tad ... small?

I can't comment on the physics of not floating off.

However that wouldn't be a planet.

[caz4213]

If the earth was the same radius as now but around 30000x lower mass would do the trick. Although then if anything travelled faster than about 100mph they'd instantly be jettisoned into space!

[SystemParanoia]

oops 10 to the power of 16

[SystemParanoia]

caz4213 said:

If the earth was the same radius as now but around 30000x lower mass would do the trick. Although then if anything travelled faster than about 100mph they'd instantly be jettisoned into space!

hitting a speed bump at 30mph would be enough to ensure you dont make it to ANY appointments for the rest of the day lol

[nre]

Ayahuasca said:

SystemParanoia said:

Ceres should be a good bet

Edit : no .. unless you can throw rocks at half a km per sec lol

Edit 2 : Phobos is about the perfect size..

Exit velocity is 40kph, which is enough to ensure you dont float away after you throw the damn rock.

so to answer your question... the mass of the planetoid would have to be 1.072 × 1016 kg

Edited by SystemParanoia on Wednesday 2nd June 15:53

What, just over a ton? Seem a tad ... small?

I think he means 10 to the power 16 not 1016.

[jmorgan]

What about something like Eros?

[shirt]

Ayahuasca said:

How small would a planet have to be to a) ensure you didn't float off and b) allow you to chuck rocks into space with hand-generated 'exit velocity'?

great post. I'd love to sit watching your mind at work for a day

[sneijder]

This is mildly interesting : http://en.wikipedia.org/wiki/3753_Cruithne if like me you are mildly interested in space rocks that float around.

[leggly]

Ayahuasca said:

Cool.

The stoner is strong in this one.

[anonymous-user]

Ayahuasca said:

SystemParanoia said:

Ceres should be a good bet

Edit : no .. unless you can throw rocks at half a km per sec lol

Edit 2 : Phobos is about the perfect size..

Exit velocity is 40kph, which is enough to ensure you dont float away after you throw the damn rock.

so to answer your question... the mass of the planetoid would have to be 1.072 × 1016 kg

Edited by SystemParanoia on Wednesday 2nd June 15:53

What, just over a ton? Seem a tad ... small?

er... 10 million billion tonnes.