7. :: The Position Function s(t) of a particle moving on a horizontal axis is shown below. Use the graph to answer the following questions. meters 30 20 Inf. Point 10 1 2 3 6. 7 8 19 10 11 12 13 14 sec -10 Inf. Point -20 -30 Inf. Point -40 -50 Start Finish a) Is the acceleration positive, negative or zero at t = 9 sec ? b) Is the particle speeding up or slowing down at t=7 sec? c) What was the total distance traveled for the first 8 seconds? d) Is the velocity positive, negative or zero at t =1 sec ? e) Is the particle speeding up or slowing down at t = 5 sec ? f) Is the acceleration positive, negative or zero at t = 4 sec? g) What was the total distance traveled between 8 and 14 seconds? h) What was the displacement between 4 and 9 seconds? i) Is the acceleration positive, negative or zero at t =5 sec ? j) Is the velocity positive, negative or zero at t = 2 sec?

7. :: The Position Function s(t) of a particle moving on a horizontal axis is shown below. Use the graph to answer the following questions. meters 30 20 Inf. Point 10 1 2 3 6. 7 8 19 10 11 12 13 14 sec -10 Inf. Point -20 -30 Inf. Point -40 -50 Start Finish a) Is the acceleration positive, negative or zero at t = 9 sec ? b) Is the particle speeding up or slowing down at t=7 sec? c) What was the total distance traveled for the first 8 seconds? d) Is the velocity positive, negative or zero at t =1 sec ? e) Is the particle speeding up or slowing down at t = 5 sec ? f) Is the acceleration positive, negative or zero at t = 4 sec? g) What was the total distance traveled between 8 and 14 seconds? h) What was the displacement between 4 and 9 seconds? i) Is the acceleration positive, negative or zero at t =5 sec ? j) Is the velocity positive, negative or zero at t = 2 sec?