Question

what happen to a time of simple pendulum if it is taken to a jupiter

Answer 1

As value of g is greater on jupiter.

Time period will decrease there.

Answer 2

According to EK, a pendulum would not swing on an orbiting spacecraft.. Objects in space are in constant free fall towards earth. Since the whole pendulum is in free fall motion, the arm of the pendulum is going at the same speed as the rest of it, and it does not swing.