Question

An object has weight W on earth. What is the weight of the object if it's on a planet

with 1=6 the mass of the earth and 1=3 the radius of earth?

A. 1

2W

B. W

C. 3

2W

D. 2W

Answer 1

$W_1=GMm/r^2$

$W_2=G(M/6)m/(r/3)^2=(GMm/r^2)\cdot(3/2)=3W_1/2$

$C. \ \ 3W/2$ . Answer