Question

the swing of a pendulum gradually decreases with time. however, even then it is regarded as a reliable time keeping device. why

Answer 1

Hey User!
Here's ur answer!
Although the swing of pendulum gradually decreases even though it acts as a reliable time keeping device because it us a very good Harmonic Oscillator.
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Answer 2

Answer:

• The swing of a simple pendulum is dependent on time. As time increases, the swing of pendulum decreases and eventually becomes zero.
• If the swing does not have any motion then also period of swing will remain same as before.
• Hence for this reason pendulum is regarded as reliable time keeping device.
• The spring action has vital role to play in all time keeping devices for swinging purposes.  
• An object is fixed at one point and the pendulum connected to object moves back and forth or oscillates due to gravitational force of earth.