However, a heavier bob helps to keep the pendulum moving smoothly until it receives its next push from the clock's one second pendulum, widely used in grandfather clocks and many others, is 15 lbs (6.8 kg).
However, a heavier bob helps to keep the pendulum moving smoothly until it receives its next push from the clock's escapement mechanism. A common weight for the bob of a one second pendulum, widely used in grandfather clocks and many others, is 15 lbs (6.8 kg).