A player kicks a football at an angle of 370 with the horizontal and with an initial speed of 16 m/s. A second player standing at a distance of 33m from the first in the direction of the kick starts running to meet the ball at the instant it is kicked. Assuming the player is already running at constant speed, how fast must he run in order to catch the ball before it hits the ground

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=