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A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floor and that its period is 11.5 s.
(a) How tall is the tower?
_________ m

(b) If this pendulum is taken to the Moon, where the free-fall acceleration is 1.67 m/s2, what is the period there?______S


    a. h = g*T^2/4pi^2.
    h = 9.8*(11.5)^2/39.4 = 32.9 m.

    b. T^2 = 4pi^2*(L/g).
    T^2 = 39.4*(32.9/1.67) = 776.2
    T = 27.9 s. = Period

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