The distance x of a particle moving in one dimension, under the action of a constant force is related to time is given by the equation t = 2x +1+3 . where x is in metres and
in seconds. Find the displacement of the particle when its velocity is zero. PLEASE SOLVE ​

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.