Scallops eject water from their shells to provide a thrust force. The graph shows a smoothed graph of actual data for the initial motion of a 25 g$25g$ scallop speeding up to escape a predator. What is the magnitude of the net force needed to achieve this motion? How does this force compare to the 0.25 N$0.25N$ weight of the scallop?

v (m/s) 0.3 0.2- 0.1- 0.0+ 1(s) FIGURE P4.20 0.0 0.1 0.2 0.3