Help please! A potato gun having a 0.580 m long barrel fires a 300 g potato by means of expanding gas. As the gas expands, the force on the potato is Fx = 14,000 N + (8500 N/m)x − (25,500 N/m2)x2, where x is in meters the x axis is along the length of the barrel. Determine the work done by the gas on the potato as it travels the length of the barrel.

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=