Un cuerpo de 1250 kg se mueve sobre una superficie horizontal por la acción de un mo tor que produce una fuerza de 24500 N. Sabiendo el cuerpo solo aprovecha el 45% de la fuerza que genera el motor y que el coeficiente de rozamiento es 0,15, la aceleración que experimenta el cuerpo vale: a) 80 m/s

b) 7,9 m/s?

c) 7,3 m/s

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=