Question

What for a pendulum is used

Answer 1

Hey here is your answer :

Pendulum is used in scientific instruments such as accelerometres and seismometres..
Historically they were used as gravimetres to measure the acceleration of gravity in geophysical surveys and even as the standard of lenght ....

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Answer 2

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look it beb
below_____________________________
pendulum is used in scientific instrument such as accelerometer and seismometer.
and also used as gravimeter to measure the acceleration of gravity....