As a train enters the station it slows down from 40 m/s to a 10 m/s in 5 seconds 1 what is the acceleration of the train

2 how far does the train travel during this time

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.