0 M) Na: LIEU :Lure: z / au lop/701 Direct Measurement \\deo In this case, defining a coordinate system basically means deciding where to place your ruler and when to \"reset\"yourstopwatch. These decisions will set the origin of your coordinate system, i.e. it will define what (x=0cm, t=Os) means, and it also defines the scale and direction of your position axis. Three students are discussing which coordinate system to pick for their measurements Peter says: "I think we want to make sure we get all the data, so we should start when the video starts: t=0 should be the first frame in the video, and we should place the ruler with the 0 cm line at the left edge of the video screen. \" Ana says: "I agree we want to get as much data as possible, but there isn't any motion in the first 43 frames I think we should start collecting data when motion is first visible, so I would reset the stopwatch to zero in frame 43, when the ball first appears. The first 42 frames really aren't relevant." Grace says:\"l agree with Ana, and, along the same lines, I think we should place the ruler with 0cm mark on the ball in frame 43 - since we are free to choose where to place our origin, I think it makes sense to put it where the ball will be at time 0s" Which student(s) do you agree with? Why? EE um I agree with Peter, although the ball does not come in until the 43 frame, it is still important to collect data from the beginning. In order to record the time it took for the ball to reach the frame, and then the time it reached the frame and hit the can, Assessing from the beginning will also although us to see the exact measurements of when it came in, if we cut it off at 43, maybe we miss something at 42. I agree to put the ruler at the 0cm line as Peter had also stated. 0 Saved 4. Which coordinate system will you use for your measurements? Define it here. Hint: If you are placing your 0cm ruler mark "on the bal ',' where will you put it? In the center? Along the right edge or left edge? Defend your choice. BIUEEE Ivl IAI olll I would place the ruler down where the 0cm mark would be more towards the left side. Placing it right where the edge ends on the left/underneath where the ball shoots out of the cannon. I would do this so it could an accurate measurement of where the ball began to where it ended. Score: 0/ 2