Topic 5 recap

4. the 'u' in the v2-u2=2as equation stands for the _ _ _ _ _ _ _ velocity
7. an object moves 2m away from a person then 2m back towards them - what is the displacement of the object?
9. if a line is curved and we want the gradient at a specific time we need to add an extra line to the graph, 'sitting' on the curve - what is this line called?
12. speed = distance divided by...
13. this type of 'gate' is used in the 'air track' required practical - it is connected to a datalogger
14. this is a single force which can replace all of the other forces acting, but have the same effect
15. the unit for energy
17. drinking alcohol, using a mobile phone or chatting to passengers can all increase a driver's _ _ _ _ _ _ _ _ distance
18. thinking distance + braking distance = _ _ _ _ _ _ _ _ distance
19. we can write this sign in front of the number to show that the object is moving towards us
20. you can calculate the distance travelled from a speed-time graph by working out the _ _ _ _ under the graph

1. this type of physics quantity has magnitude and direction
2. to show how easy or difficult it is to stretch a spring we can look at the spring _ _ _ _ _ _ _ _ (it has the symbol 'k' in the formula)
3. this feature of a distance-time graph shows us the speed of the object
5. friction, air resistance and weight are all examples of this type of force
6. in a collision, the total momentum is...
8. in the Hooke's law required practical, you need to subtract the original length of the spring from the new length to calculate the ... of the spring
10. the unit for 'force'
11. the unit for mass
16. this has the unit kgm/s
18. this type of physics quantity only has magnitude (size)