56. BIO The Fall of T. rex Paleontologists estimate that if a
Tyrannosaurus rex were to trip and fall, it would have experi-
enced a force of approximately 260,000 N acting on its torso
when it hit the ground. Assuming the torso has a mass of
3800 kg, (a) find the magnitude of the torso's upward accelera-
stion as it comes to rest. (For comparison, humans lose con-
4 sciousness with an acceleration of about 7g.) (b) Assuming the
motorso is in free fall for a distance 1.46 m as it falls to the ground,
how much time is required for the torso to come to rest once it
contacts the ground?
