(a) A bungee jumper with mass 52.0 kg reaches a speed of 13.5 m/s moving straight down when the elastic cord tied to her feet starts pulling her back up. After 0.0250 s, the jumper is heading back up at a speed of 10.7 m/s. What is the average force that the bungee cord exerts on the jumper?
(b) What is the average number of g's that the jumper experiences during this direction change?