2.1. in the real world, g is 6.67x10-11 nm2/kg2. the programmer of this applet did not use this number. computers are much quicker at computing with integers than very small numbers like g. to control this program and calculate orbits, the number the program uses for g in the simulation will have to be measured. this can be done using newton's synthesis.
2.2. to solve newton's synthesis, start by setting the equation for net force acting in the centripetal direction equal to the force of gravity equation: σfc = fg . substitute the respective formulas and solve the equation for g. label one mass star and the other planet (it could also be planet with moons, or planet with satellites). for newton's synthesis, what is the equation for fg using g for the gravitational constant, ms for the mass of the sun (central object), mp for the mass of the planet, r for the radius or distance from sun (central object) and v for velocity of the planet?

Your starship, the aimless wanderer, lands on the mysterious planet mongo. as chief scientist-engineer, you make the following measurements: a 2.50-kg stone thrown upward from the ground at 14.0 m/s returns to the ground in 5.70 s ; the circumference of mongo at the equator is 2.20×10^5 km ; and there is no appreciable atmosphere on mongo. (a) the starship commander, captain confusion, asks for the following information: what is the mass of mongo? (b) if the aimless wanderer goes into a circular orbit 2.20×10^4 km above the surface of mongo, how many hours will it take the ship to complete one orbit? (c) an unmanned spacecraft is in a circular orbit around the moon, observing the lunar surface from an altitude of 44.0 km . to the dismay of scientists on earth, an electrical fault causes an on-board thruster to fire, decreasing the speed of the spacecraft by 23.0 m/s . if nothing is done to correct its orbit, with what speed (in km/h) will the spacecraft crash into the lunar surface?