There are four basic forces in nature: gravity, the electromagnetic force, the strong nuclear force, and the weak nuclear force. of the four basic forces which acts over the shortest distance? a gravity b electromagnet force c strong nuclear force d weak nuclear 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?