After going through this interactive e-learning, you are expected to:

1. Compare and contrast the Aristotelian and Galilean conceptions of vertical motion, horizontal motion, and projectile motion.

2. Explain how Galileo inferred that objects in vacuum fall with uniform acceleration, and that force is not necessary to sustain horizontal motion.

3. Explain the subtle distinction between Newton’s 1st Law of Motion (or Law of Inertia) and Galileo’s assertion that force is not necessary to sustain horizontal motion.