# Chapter 19 - Think and Explain: 49

The natural frequency will be the same.

#### Work Step by Step

The period of a pendulum is independent of the mass of the bob. This is stated on page 358. Note: we assume that the suitcase's center of gravity doesn't shift, which is reasonable if the suitcase is fully packed. If the CoG did shift, the pendulum's effective length would change, and that WOULD affect the period and the frequency.

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