consider a planet in some solar system which has a mass double that of earth and density equal to the average density of earth an object weighing w on earth will weigh
Answer (1)
Student Expert
12th Oct, 2019
First of all, Mass of the planet Mp will become two times Mass of earth M. Since density is given to same you go with the formula M/R^3 and you compare Mass upon radius cube of Earth with the planet. Accordingly substitute the things and get the answer..
W = GmM/R^2 (the values on earth);''
now on the planet
M_p = 2M and density is same hence
M_p/(R_p)^3 = M/R^3
R_p = (cube root 2) * R
Thus the W_p = [2/(cube root 4)]*W = (cuberoot 2)
You need to practice a lot for such types of numericals.. You can refer to some books like Marvel or USS and thus increase your knowledge and skill-set as well.
Best wishes. Thankyou.
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