The problem that follow involve straight-line motion. The time t is in seconds unless otherwise stated.
Problem
The greatest ocean depth yet discovered is the Marianas Trench in the western Pacific Ocean. A steel ball released at the surface requires 64 min to reach the bottom. The ball s downward acceleration is a = 0.9g – cv, where g = 9.81 m/s2 and the constant c =3.02 s–1. What is the depth of the Marianas Trench in kilometers?
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