Question

What is the acceleration of free fall on a planet with four times the mass of the Earth, but eight times the volume? Write your answer as a multiple of g.

Answer 1

Answer:

q

′

=

R

2

GM

=

(4ve)

2

G×2me

=

8

1

ve

2

Gme

=

8

g

To find 4 times the acceleration due to gravity =4×

8

1

g=

2

g

=

2

10

=5m/s

2