Question

For Part 2 of this assignment, you will use the “Assignment 1 – Linear Kinematics Data” excel file. In the data set you are provided with vertical position and time data for a person’s vertical center of mass motion for an unspecified movement task.

You will utilize excel in all (well, some…) of its glory to calculate the vertical velocity and vertical acceleration data from the position and time data provided in the excel file. Again you will use the First Central Difference Method to calculate velocity and acceleration at each frame. Once the velocity and acceleration data have been calculated, plot the position, velocity, and acceleration data against time, either as one graph per variable or all three variables on one graph (using primary and secondary axes). Be sure to label the graphs neatly and appropriately such that you would be confident including them in a formal presentation based on the instructions provided in the tutorials.

Frame	Time	Vertical COM Position (m)
0	0.0	5.00
1	0.1	5.00
2	0.2	5.00
3	0.3	5.00
4	0.4	5.00
5	0.5	5.00
6	0.6	4.99
7	0.7	4.99
8	0.8	4.98
9	0.9	4.98
10	1.0	4.97
11	1.1	4.93
12	1.2	4.86
13	1.3	4.76
14	1.4	4.67
15	1.5	4.66
16	1.6	4.71
17	1.7	4.89
18	1.8	5.14
19	1.9	5.24
20	2.0	5.35

1. Between 1 and 1.5 seconds, what direction is the person moving? Are they speeding up, slowing down, or both during this time period?
2. Between 1.75 and 2 seconds, was the acceleration positive, negative, or both? In addition, was the person moving upward, downward, or both during this time period?
3. At approximately what time is the person moving at the fastest velocity and in what direction are they moving at this time?
4. Based on your understanding of the position-velocity-acceleration relationship, what human movement does this data represent assuming the data represent the entire movement task from start to finish?

Answer 1