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Fuel Calculator for NASA mission

Description

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This application aims to calculate fuel to launch from one planet of the solar system and land on another planet of the solar system, depending on the flight route.

Earth - 9.807 m/s2
Moon - 1.62 m/s2
Mars - 3.711 m/s2

The formula for fuel calculations for the launch is the following:

mass * gravity * 0.042 - 33 rounded down

The formula for fuel calculations for the landing is the following:

mass * gravity * 0.033 - 42 rounded down

examples of programs and required fuel for the whole mission:

Apollo 11:
path: launch Earth, land Moon, launch Moon, land Earth
weight of equipment: 28801 kg
weight of fuel: 51898 kg

Mission on Mars:
path: launch Earth, land Mars, launch Mars, land Earth
weight of equipment: 14606 kg
weight of fuel: 33388 kg

Passenger ship:
path: launch Earth, land Moon, launch Moon, land Mars, launch Mars, land Earth
weight of equipment: 75432 kg
weight of fuel: 212161 kg

Run Rspec

rspec fuel_calculator_service_rspec.rb

Run for show example mission

ruby app.rb

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