Paleontologists estimate that if a Tyrannosaurus rex were to trip and fall, it w

Question

Paleontologists estimate that if a Tyrannosaurus rex were to trip and fall, it would have experienced a net force of approximately 256,300 N acting on its torso when it hit the ground. Assume the torso has a mass of 3720 kg.

a.) Find the magnitude of the torso's upward acceleration as it comes to rest. (For comparison, humans lose consciousness with an acceleration of about 7g.)
______m/s^2

b. Assuming the torso is in free fall for a distance 1.63 m as it falls to the ground, how much time is required for the torso to come to rest once it contacts the ground?

________s

Explanation / Answer

acceleration=Force/mass =256300/3720 =68.89 m/sec^2 =7.03g (approx.) S=0.5at^2 ==>t=sqrt(2S/a) ==>t=sqrt(2x1.63/68.89) ==>t=0.217 sec.

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