Question

Taking the acceleration due to gravity at the earth's surface equal to g = 9'8 m/s and G = 667 × 10- 5 unit, calculate the average density of the planet Mars, given that its diameter 6780 km and the acceleration to its gravity on its surface = 0:38 g.​

Answer 1

Answer:

acceleration due to gravity is given by

g=

r

2

GM

so comparing that with that of moon, we get

g

moon

=

(

4

r

)

2

G

40

M

=>

5

2

g

g

moon

=

5

2

×9.8=1.96

so best option is option B