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Homework Help: [Solved] Substended angle, rotational kinematics

  1. Aug 28, 2011 #1
    A jet is circling an airport control tower at a distance of 18.0 km. An observer in the tower watches the jet cross in front of the moon. As seen from the tower, the moon substends an angle of 9.04 x 10-3 radians. Find the distance traveled (IN METERS) by the jet as the observer watches the nose of the jet cross from one side of the moon to the other.

    2. Relevant equations and Givens
    Θ = s/r
    Θ = 9.04 x 10-3 radians
    r = 18000 m

    S = rΘ = (18000*9.04x10-3)
    S = 162.7 units?!?!

    When I plug in these values into the equation Θ = s/r we have:
    1. Θ in radians
    2. r in meters
    3. Is the unit of S always in meters when applied to this equation?

    I have looked from the beginning of the chapter to the end, word for word, and cannot find the answer to my question.
  2. jcsd
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