Newton's first and second laws
- A compressed spring is pushing a block across a rough horizontal table.
- A brick is falling from the roof of a three-story building.
- A rocket is launched at a 30° angle. Air resistance is not negligible
- A car on a very slippery icy road is sliding headfirst into a snowbank, where
it gently comes to rest with no one injured. (Question: What does “very
slippery” imply?)