GCSE Edexcel Physics - Motion and Forces

GCSE Edexcel Physics - Motion and Forces

1. A scalar has a magnitude but no direction

2. A vector has a magnitude and a direction

3. Velocity is speed in a stated direction

4. Speed = distance / time

5. On a distance time graph, the gradient is the speed

6. Acceleration = change in velocity / time

7. On a velocity time graph, the gradient is acceleration

8. On a velocity time graph, the area under the graph is the distance

9. Acceleration in free fall is 10ms^-2 due to gravity

10. Newtons first law - where the resultant force is 0, the object will remain stationary / at a constant velocity

11. Newton's second law - Force = mass x acceleration

12. Weight = mass x gravity

13. Weight can be measured using a newton meter

14. The higher the weight of a body, the higher it's gravitational field strength

15. An object moving in a circular motion has a constant speed but a changing velocity as it changes direction

16. For circular motion there must be a centripetal force towards the centre of the circle

17. Walking - 1.4m/s

18. Running - 3m/s

19. Cycling - 5.5 m/s

20. Cars (built up) - 13m/s

21. Cars (motorway) - 31m/s

22. Planes - 250m/s

23. Trains - 55m/s

24. Wind - 5-20m/s

25. Sound in air - 340m/s

26. Ferries - 15m/s

27. Weight is the force acting on an object due to gravity

28. 1) Record the mass of the trolley, unit masses and hanging hook

29. 2) Mark a line on the ramp before the first light gate so the trolley moves the same distance

30. 3) Attach the trolley to the hanging mass and let go of it at the start line

31. 4) Each light gate records the time that the trolley passes through and the speed of it at that time

32. 5) Acceleration can be calculated by using the initial speed (1st gate), final speed (last gate) and the time taken to move between them

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