1. The problem statement, all variables and given/known data 1. A pendulum is set swining on the moon from a frictionless anchor point. Will it stop moving? Why or why not? 2. A grandfather clock has a swinging pendulum. Why does it need to be wound up every few days? 3. How can a rocket change the direction when it is far out in space in a vacuum? Include momentum, impulse, and force in your discussion. 2. The attempt at a solution Well, I'm really lost but here goes-- 1. According to Newton's First Law once a force is applied to an object it accelerates in the same direction and there's no gravity or friction to stop it? 2. No idea... 3. For every force, there is an equal and opposite force, so when a rocket takes off, it ejects a large amount of gas and creates a momentum upwards?