posted by pam .
free fall on the moon is 1.62m/s2 What is the lenght of the pendulum whos period on the moon mtches the period of 1.80m long on Earth?
Period=2PI sqrt (l/g) where g is as given.
squkare both sides. For g=9.8, solve for Period T.
then put that T in the moon example, with g=1.62, and solve for l.