Across
- 1. Push due to contact with a surface such as the ground. Always acts perpendicular to the surface is ___ force
- 3. The science that deals with matter and energy
- 5. Actively pushing off air (Often generated by a helicopter with spinning blades or a rocket burning fuel)
- 9. How much stuff(protons, neutrons, and electrons) an object is made of
- 11. Surface resistance
- 12. Describes an object's change in velocity each second
- 14. Energy stored in a stretched or compressed material is ___ potential energy
- 18. Describes how far an object moves
- 19. It occurs when a force acts on an object to move it some distance from the start point
- 20. Energy stored due to elevation is ___ potential energy
Down
- 2. The product of a force and distance the force was applied (in the opposite direction)
- 4. Friction between two or more solid objects that are not moving relative to each other is ___ friction
- 6. Pull by a rope, string, or cable
- 7. Gravitational pull of the earth
- 8. Energy of motion is ___ energy
- 10. Describes how fast an object is moving
- 13. Measurement of the "roughness" of surfaces is the ___ of friction
- 15. Total displacement divided by the total time taken is ___ velocity
- 16. Resistance due to moving through air
- 17. The capacity for doing work