Define inertia and provide an example illustrating its principle. State Newton's third law of motion and give an example to demonstrate its application. A block slides down a frictionless inclined plane. Explain how to resolve the weight of the block into parallel and perpendicular components to the plane. An astronaut on the moon drops a feather and a hammer from the same height at the same time. How does the acceleration due to gravity affect their fall? Explain. When you swing a bucket full of water in a vertical circle at just the right speed, the water stays inside due to the concent of centripetal force. Saved