Physics

Problem

Two spherical planets P and Q are made of the same material (uniform density). Their radii are in the ratio

R_{\text{P}}:R_{\text{Q}} = 1:2

. What is the ratio of their surface accelerations due to gravity

g_{\text{P}}:g_{\text{Q}}

? a)

1:4

2:1

1:2

1:1