Year 9 Physics Revision

4. A line on a distance-time graph that shows a faster speed.
5. The speed of an object at a specific moment in time.
6. The rate of change of speed or velocity.
7. On a distance-time graph, a horizontal line means the object is _______.
11. The standard unit used to measure force.
12. A force where objects can attract or repel each other over a distance without touching.
14. The upwards force acting on an object moving forwards through fluids.
18. The "m" in the speed unit m s-1 stands for _______.
19. Variables that are kept the same so they do not affect the results.
22. A force that always opposes motion or attempted motion.
24. The downward force caused by gravity on an object.
25. The perpendicular force acting on an object resting on a surface.
26. A force between two objects that are touching.
27. Speed in a specific, defined direction.

1. The attractive or repulsive force between two charged objects.
2. The Greek symbol delta means "the _______ in".
3. Negative acceleration, or when an object is slowing down.
5. The variable that the experimenter deliberately changes; goes on the X-axis.
8. A friction force that opposes forward motion through fluids, like air resistance.
9. The variable that you measure or the data you collect; goes on the Y-axis.
10. A push or a pull that causes a change in speed, direction, or shape.
13. Speed that is increasing the same distance over each unit of time.
15. The driving or applied force that acts in the same direction of motion.
16. The upward force acting on objects placed in fluids like water.
17. A force between two objects that are not touching.
20. The pulling force acting along cables or ropes.
21. The type of line on a velocity-time graph that shows constant acceleration.
23. The "h" in the speed unit kmh-1 stands for _______.