Why are force fields used to describe magnetic force? A. Magnetic force acts between two objects that are not touching. B. Magnetic force is a form of gravity. C. Magnetic force acts between any two objects with mass. D. Magnetic force can only attract objects. tic force?

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?