Mass does not affect the pendulum's swing. The longer the length of string, the farther the pendulum falls; and therefore, the longer the period, or back and forth swing of the pendulum. The greater the amplitude, or angle, the farther the pendulum falls; and therefore, the longer the period.
First you need to have an account.
Explanation:
so sorry
don't know but please mark me as brainliest please
I believe it's b. A flashlight