A dwarf planet D possesses 2 % of Earth’s mass and 20 % of Earth’s radius.
a. (i) Calculate the acceleration due to gravity on the surface of planet D as a fraction of the acceleration due to gravity on Earth.
b. (ii) A robotic vehicle has a mass of 200 kg. Find its weight on planet D.
c. (iii) Determine how many identical vehicles must be placed together on planet D so that their combined weight equals the weight of a single vehicle on Earth.