Question

Two objects are dropped simultaneously from an initial height of 100m, with an initial velocity of zero. They fall straight down. For mass 1, you can ignore air drag. For mass 2, air drag DOES affect the motion. Here is the position vs. time for both objects: 100 90 80 y 100-0.1164't-4.795*t40.1283*t3 70 60 mass 1: no air drag a mass 2: with air drag 40 30 y-100-1/2 9.8*t2.. 20 10 time (s) 1) Calculate the kinetic energy of mass 1 (no air drag) JUST before it hits the ground. (let m 3.0 kg) 2) Calculate the kinetic energy of mass 1 (no air drag) JUST before it hits the ground. (let m2 3.0 kg) 3) For mass 1 (or mass 2) calculate the work done by gravity, from 100 meters to 0 meters, so over the entire height. 4) For mass 2, calculate the work done by air drag, from 100 meters to 0 meters, so over the entire height.

Answer 1

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FORCE f Wo 9740y RLEASEO 1796, 78 UV A

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