Question

A newly discovered planet has a mass 1.5 times compared to that of the earth, and its diameter is 3 times compared to earth. What is the gravitational acceleration on this planet?

Answer 1

now this is a formula i have definitely forgotten

Answer 2

Fg = Gm1m2/r^2

Answer 3

or Fg = Gm/r^2

Answer 4

oh ok
so n1 amd m2 are the masses and r^2 = radius?

Answer 5

yes ;)

Answer 6

G is the acceleration due to gravity?

Answer 7

G = 6.67 X10^-11

Answer 8

yes :)

Answer 9

I'm not entirely clear about it and i haven't the time to look it up . sorry

Answer 10

oh it's okay thank you :)

Answer 11

can you help me @ganeshie8 :)

Answer 12

http://openstudy.com/study#/updates/55bd3e54e4b01850ec7d74c7

Answer 13

\[mg=G \frac{Mm}{r^2}\]
\[g=G \frac{M}{r^2}\]\[g \alpha \frac{M}{r^2}\]
\[\frac{g'}{g}=\frac{\frac{M'}{r'^{2}}}{\frac{M}{r^2}}\]\[g'=g \frac{M'r^{2}}{Mr'^{2}}\]
M'=Mars of new planet
r'=radius of new planet
M=mass of earth
r=radius of earth
Also given
\[M'=1.5M\]
for the radius also u can calculate