A Pendulum Clock Uses a Simple Pendulum as Its Timing

question 77

Multiple Choice

A pendulum clock uses a simple pendulum as its timing device. The clock is correct at noon. The next day, when the clock reads noon, the actual time is 11:50 a.m. What is the fractional change in pendulum length that must be made so the clock runs at the correct rate?

• A)1.40% longer
• B)16.7% longer
• C)0.699% longer
• D)0.699% shorter
• E)2.84% longer

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