A box of unknown mass accelerates 0.5 m/s2 when a force 0f 50 N is exerted on it. What force is needed to cause the box accelerate at 8m/s2?

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=