There was an interschool science quiz held today which had the following question:
A pendulum oscillates at the RATE of 5 oscillations per minute on EARTH. What will happen to the TIMEPERIOD of the same pendulum when it is placed on the MOON? Will it increase or decrease? Give reason for your answer.
I answered that the time period will increase because the frequency will decrease on the Moon. According to me, due to the less gravitational pull on the moon(1/6th as that of earth), the pendulum will oscillate with a less speed (frequency), and hence the timeperiod will increase.
My team wasn't awarded any points for the answer. The quizmaster said that the time period will decrease, but he too gave the same reason that I had given.
Please help me understand the answer of the question.