You pull your little sister across a flat snowy field on a sled. your sister plus the sled have a mass of 20 kg. the rope is at an angle of 35 degrees to the ground . you pull a distance of 50 m with a force of 30 n how much work do you do?

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=