What would be the weight of a 1.0kg mass on the surface of Mars? The mass of Mars is 0.11 that of the earth, and its radius is 0.53 that of the earth.

Answer 1

F = m (G M/r^2 )

Fearth = 1 (G Me/re^2) = 1 * 9.81
so for earth (G Me/r^2) = 9.81

Fmars = 1 ( G Mmars/rmars^2)
= 1 (G .11 Me/ .53^2 re^2)
= 1 (.11/(.53)^2) (G Me/re^2)
= 1 (.392) (9.81) = 3.84 Newtons