Between 1911 and 1990, the top of the leaning bell tower at Pisa, Italy, moved toward the south at an average rate of 1.2 mm/y.
The tower is 55 m tall. In radians per second, what is the average angular speed of the tower's top about its base
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You can use the Pythagorean theorem to calculate the hypotenuse, since the resultant is the hypotenuse of the triangle.