The 7.2 n weight is in equilibrium under the influence of the three forces acting on it. the f force acts from above on the left at an angle of alpha with the horizontal. the 5.5 n force acts from above on the right at an angle of 48 degree with the horizontal. the force 7.2 n acts straight down. what is the magnitude of the force f? answer in units of n. what is the angle alpha of the force f as shown in the figure above? answer in units of degree.

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=