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

Question

Quizplus · Accepted Answer

The Answer of 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

A Pendulum Clock Uses a Simple Pendulum as Its Timing