A zip line is installed 50 meters above ground level. It runs to a point on the
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A zip line is installed 50 meters above ground level. It runs to a point on the ground 50 meters away from the base of the installation. Show that the work done by the gravitational force field for a 175-pound person moving the length of the zip line is the same for each path.
(a) r(t) = ti + (50 - t)j
(b) r(t) = ti + 1/50(50 – t)²j
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