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7. Field Marshal von Weisenheimer is trying to design a metronome that will count out four beats per second. He decides to use a simple pendulum as his system where one beat corresponds to a full cycle of the simple harmonic motion. To build the metronome he attaches a small bob having a mass of 390 g to a long string having negligible mass. How long must the string be in order for the metronome to maintain the cadence that the Field Marshal requires? 1.55 cm) 8. To measure the local acceleration due to gravity on Planet wuTangolan, Poindexter takes a string having a length of 2.40 m and a small ball bearing having a mass of 102 g. When operated as a simple pendulum on Planet wuTangclan the system has a period of ation of 3.53 s. What is magnitude of the local acceleration due to gravity on Planet wuTangClan? 17.60 m/s
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