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| Let's say you dropped a metal ball from rest. Below is a set of frames (taken at equal time intervals) from a video of a metal ball being dropped straight down. Notice the ball's displacement increases as each time step elapses. The effect of air resistance is very small. To a reasonable degree, we can [[183_notes: | Let's say you dropped a metal ball from rest. Below is a set of frames (taken at equal time intervals) from a video of a metal ball being dropped straight down. Notice the ball's displacement increases as each time step elapses. The effect of air resistance is very small. To a reasonable degree, we can [[183_notes: | ||
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| If you instead dropped a coffee filter, you would observe something all together different. The frames below are taken from a video of a coffee filter dropped from rest. Notice that the displacement between each frame is roughly the same (especially near the end of the video). This latter motion could be modeled to a reasonable degree [[183_notes: | If you instead dropped a coffee filter, you would observe something all together different. The frames below are taken from a video of a coffee filter dropped from rest. Notice that the displacement between each frame is roughly the same (especially near the end of the video). This latter motion could be modeled to a reasonable degree [[183_notes: | ||