CEE 5244 Lecture Notes - Lecture 35: Photon, Terminal Velocity, Lisa Lopes
5 Apr 2016
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Plane terminal velocity: given best glide 10:1 at 30 m/s (on the slow side): Drops at 3 m/s = v/10, so mgh mgv/10 watts expended. Drag force f over v m/s (cid:1) (cid:1)(cid:2)(cid:3) watts = mgv/10. F = mg/10 at best glide speed. F proportional to v2, so f = mg terminal velocity condition is met at about 3 times best glide speed > 90 m/s: examples, continued, speed, bus jump. 150-200 ft, level (call it 45 m) Bus at 30 m/s (67 mph): takes 1. 5 seconds to cross. Drops 11 m (36 ft) in 1. 5 s. Could work, at 15-20 degree launch angle, no air drag: websites. Www. badastronomy. com: 3d glasses: stereo vision, putting it together. 3d films are shot with two cameras side-by-side mimicking your eyes. If projected on the same screen, must somehow let your left eye know to pay attention to left image, and right eye know to pay attention to right image: can use color:
