A Grandfather Clock Keeps Time Using a Pendulum Whose Length

question 55

Multiple Choice

A grandfather clock keeps time using a pendulum whose length is finely adjustable. If you have a grandfather clock that is running fast, should you shorten or lengthen the pendulum?

• A) Shorten it
• B) Lengthen it
• C) You should reduce its mass
• D) You should add mass to it

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