Math Problem Statement
The Moon orbits the Earth in an approximately circular path. The position of the moon as a function of time is given by: x(t) = r cos(饾湐t) y(t) = r sin(饾湐t) where r = 3.84 108 m and 饾湐 = 2.46 10-6 radians/s. What is the average velocity of the Moon measured over the interval from t = 0 to t = 7.89 days? Find its magnitude and direction, given as an angle measured counterclockwise from the positive x-axis. magnitude
direction 掳 counterclockwise from the +x-axis
Solution
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Math Problem Analysis
Mathematical Concepts
Trigonometry
Circular Motion
Angular Velocity
Vector Calculations
Formulas
x(t) = r cos(饾湐t)
y(t) = r sin(饾湐t)
Average Velocity: v_avg = 螖r/螖t
Magnitude of Average Velocity: |v_avg| = sqrt(螖x^2 + 螖y^2)/螖t
Direction of Average Velocity: 胃 = atan2(螖y, 螖x)
Theorems
Trigonometric functions for circular motion
Pythagorean theorem for magnitude of vectors
Suitable Grade Level
Grades 11-12
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