Chapter 28, Problem 45P

Suppose that, after falling for 13 s, the parachutist from Examples 1.1 and 1.2 pulls the rip cord. At this point, assume that the drag coefficient is instantaneously increased to a constant value of 55 kg/s. Compute the parachutist's velocity from $t=0$ to 30 s with Heun's method (without iteration of the corrector) using a step-size of 2 s. Plot v versus t for $t=0$ to 30 s.