2. The graph is a hoirzontal line. Velocity is zero.

3. The slope > 0 (positive). The object is moving towards the end position

4. The slope <0 (negative). The object is moving towards the start position

5. Speed or velocity is at middle instant of the time interval.

6. Constructing Speed time graph or velocity time graph

8. Construct from a distance-time graph (or a displacement-time graph)

9. Displacement and v-t graph The following slides show you the relationship between displacement (S) and the v-t graph (velocity-time graph)

10. Area = 0.6 x (0.2- 0.1) Area = speed x time = distance Graph area under the graph? area under the graph from t = 0.1s to 0.2s is the distance travelled during t=0.1s to 0.2s

11. V1V1 Displacement travelled by the object from time t 1 to t 2 = area A

12. The area under v-t graph V/ms -1 t/s v2v2 v1v1 t2t2 t1t1 Displacement due to v 1 from t 1 to t 2 Displacement due to the increase of velocity from v 1 to v 2 from t 1 to t 2

17. c is the y-intercept, c = 0. Slope m= a. The equation isv =at y = mx

18. ‘at’ or ‘v’ t S = area

19. ymxc

20. u ut at t 1/2 (a t 2 ) u v t S=(u+v)t/2

21. no s v a t

22. u,v,a& scan be ‘+’ or ‘-’ depend on direction

23. v = - 4ms -1 Case 1 u = 1ms -1 v = 4ms -1 t = 3s a = ? Case 2 ‘+’direction u = 1ms -1 t = 5s