Motion and Forces Definitions

6. A measure of how far something travels, ignoring direction
7. Quantities with magnitude but no direction
8. Motion caused only by gravity
12. Speed with a direction
16. Rule stating total momentum stays the same in a closed system
18. The name of the force that pulls objects toward Earth
19. A graph showing how an object’s position changes with time
20. Newton's law linking force, mass and acceleration
21. Newton's law stating objects stay still or move at constant speed unless a force acts
23. Motion where direction constantly changes but speed may stay the same
24. The time it takes a human to respond to something

1. The straight‑line change from start to finish in a specific direction
2. Name given to the distance travelled during the driver’s reaction time
3. The single force that replaces all others acting on an object
4. A measure of how fast something travels — no direction needed
5. A graph used to find acceleration from its gradient
9. Rate of change of velocity
10. Force that acts towards the centre in circular motion
11. Name given to the distance calculated from the thinking distance plus the braking distance
12. Quantities with magnitude and direction
13. The unit used to measure force
14. Newton's law stating forces between objects are equal and opposite
15. Calculated by multiplying the mass and the velocity together
17. How difficult it is to change an object’s velocity
22. Name given to the distance travelled while the brakes are applied