The mass of a pendulum's bob does not affect the period

Physics May 31, 2021

The mass of a pendulum's bob does not affect the period.

can be used to explain this phenomenon. In F = m a, force is directly proportional to mass. As mass increases, so does the force on the pendulum, but remains the same. (It is due to the effect of gravity.) Because acceleration remains the same, so does the time over which the acceleration occurs.