The gravitational field strength is proportional to the product of density and radius. Does this help?
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Original post by Mr M
The gravitational field strength is proportional to the product of density and radius. Does this help?
Spoiler
thanks that was a bit helpful
Original post by Beamchain
thanks that was a bit helpful
Just a bit?!
Original post by shahbaz
1st calculate the volume (1.6x10^7)^3 x 4pi/3 = 1.715x10^22
now times by 3000 to get mass = 5.14x10^24
g=((6.67x10^-11)x(5.14x10^24))/((1.6x10^7)^2) = 13.4N/kg
now times by 3000 to get mass = 5.14x10^24
g=((6.67x10^-11)x(5.14x10^24))/((1.6x10^7)^2) = 13.4N/kg
It isn't necessary to make any calculations to obtain the correct answer.
Original post by Mr M
It isn't necessary to make any calculations to obtain the correct answer.
Why not?
Original post by shahbaz
Why not?
Because the product of density and radius is the same for both planets.
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