NCERT Solutions for Class 7 Science Chapter 13
Important NCERT Questions
7th Chapter 13 Motion and Time
NCERT Books for Session 2022-2023
CBSE Board and State Board
Questions No: 3
A simple pendulum takes 32 s to complete 20 oscillations. What is the time period of the pendulum?
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The time taken to complete one oscillation is known as time period of the pendulum.
𝑇𝑖𝑚𝑒 𝑝𝑒𝑟𝑖𝑜𝑑=𝑇𝑜𝑡𝑎𝑙 𝑡𝑖𝑚𝑒 𝑡𝑎𝑘𝑒𝑛/𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑜𝑠𝑐𝑖𝑙𝑙𝑎𝑡𝑖𝑜𝑛𝑠=32/20=1.6 𝑠𝑒𝑐𝑜𝑛𝑑𝑠
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The time period of a pendulum is the time taken for one complete oscillation, which is calculated by dividing the total time by the number of oscillations.
Given that the simple pendulum takes 32 seconds to complete 20 oscillations, we can find the time period using the formula:
Time period = Total time / Number of oscillations
Time period = 32s / 20oscillations
Time period = 1.6s per oscillation
Therefore, the time period of the pendulum is 1.6 seconds per oscillation.