Across
- 1. Hard work to get something done.
- 3. The act of moving.
- 6. People who are good at sports.
- 7. The power needed to do work or move things.
- 8. A force that slows things down.
- 9. Pushes something forward.
Down
- 1. People who design and build things.
- 2. A boat that can travel underwater.
- 4. Smooth and shaped to move easily through water or air.
- 5. When two surfaces rub together and slow things down.