true or false. if you kick a soccer ball and there are no forces like friction acting on it will it keep moving?

Which changes of state do the labels represent? a: b: c:

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?

Which two particles are found in the center of an atom