With the help of an activity, explain how will you measure the time period of a simple pendulum

cbse
cbse-class-7-science
motion-and-time

#1

With the help of an activity, explain how will you measure the time period of a simple pendulum.

Answer:

Activity:

  • Suspend a metallic ball (bob) by a long thread from a rigid support. Your simple pendulum is ready.
  • Set the simple pendulum in motion.
  • Note the time in your watch when bob is at an extreme position (say A).
  • When the bob again comes to the position A, count 1 (one). Each time the bob reaches this position (A), increase the count by 1 (one).
  • Check the time after 25 such oscillations. Find the time taken in 25 oscillations.