Use the universal law of gravitation to solve the following problemsTwo cars of mass 3000kg are 2m apart. What is the force between them?The force of gravity between a planet and its moon is 371N. If the planet has a mass of 4*10^22kg and the moon has a mass of 5*10^5kg, what is the distance between their centers?The force of gravity between Tim and John is 1.85*10^-9N. If they are 18m apart and Tim has a mass of 120kg. What is johns mass?