Find the mass of planet Romulus where it is observed that a meteor is approaching on a collision course. At 7514 km from the center of the planet, the meteor has a speed of 136.0 m/s and later at 2823 km a speed of 8392.0 m/s.

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy.work depends on the square of the change in potential energy.work is equal to the negative of the change in kinetic energy.work is equal to the square of the change in kinetic energy