Question

On a planet whose radius is 3.9×10^7m, the acceleration due to gravity is 19 m/s^2. What is the mass of the planet? Express your answer in scientific notation in the provided spaces below.

Answer 1

Mass of the planet is 3.1×1019

Gravity = GM/r2 . Where G is the universal constant for gravity, which is 6.67 x 10-11 m3kg/-1s-2
r = the radius of the planet
This formula shows that the mass of the planet is a direct proportion to the acceleration of gravity
If the acceleration of gravity is 19 m/s-2, then the mass will be 3.1 x 1019

This equation is known as Newtons law of universal gravity