An elevator ascends at a constant speed of 4 m/s, how much time is required for the elevator in order to travel 120 m upwards

What color would an object that reflects green and blue light appear to be in white light? a. blue b. cyan c. magenta d. black

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?

Could someone me find the answer to this problem.