7. Which of the following object(s) would be suitable for building a functional clock? Note: you must clearly mark your answer (for example, highlight it in red) from the multiple-choice list below and you must provide an explanation of your answer(s) to receive credit. Review: course textbook (section 9.1).
a. A superball bouncing on a hard floor
b. A Foccault pendulum (a large mass hanging from a tall structure using on a long wire)
c. A chair hanging by a bungee cord from the ceiling
d. A ribbon fluttering back and forth in the wind
e. A bored, six-year old child repeatedly kicking the bottom of your airplane seat
Explanation:
b. A Foccault pendulum (a large mass hanging from a tall structure using on a long wire)
T=const during the long period of time