Simple harmonic motion The acceleration of gravity in Beijing is 9.8012 meters per second. What's the length of the second pendulum in Beijing According to the formula, we need to know the period to get the pendulum length The title does not give a period How should I ask for it

Simple harmonic motion The acceleration of gravity in Beijing is 9.8012 meters per second. What's the length of the second pendulum in Beijing According to the formula, we need to know the period to get the pendulum length The title does not give a period How should I ask for it

The second pendulum length of Beijing is L = 0.9940m ≈ 1m
Second pendulum
The second pendulum is a simple pendulum whose time from left to right is one second. On the earth, its radius is about 1m
The period is two seconds
The half period is 1 s
T=2π（(L/g)^(1/2)
TT=4ππL/g
4=4ππL/9.8012
L=0.9940m≈1m