
yeaaaa boi
Context:
In Unit V: Ratios and Rates we learned about how ratios and rates are applied to both imaginary and real life situations. One of the activities that were in this unit was to build a “model car” that has to be feet-powered and race with it. The objective of this activity was to determine the speed of each person into a s/m rate, and then guess on what our time would be when the actual race begins. We have no idea how long the race is when measuring our speeds. You “win” by getting the most accurate rate of your predicted rate : your actual rate. Although we did not win, we still had a fun time.
————————————————————————————————————————————
Reflection:
1. What math did you use for this project?
The math we used was some ratio/rate calculating. First, we took a 10-meter test of each person walking, and then divided the seconds counter by 10 to get your s/m rate. When the race day came, the length of the race track was revealed and we used our s/m of each person to calculate the seconds it took to finish the race by multiplying the ratio by [meter count] to get:
([meter count] x [seconds] seconds : [meter count] meters)
For example, if someone was walking at 0.9 s/m and the race track was 109 meters, we would get an estimated time of [109] x [0.9] seconds. That would equal 98.1 seconds which is 1 minute and 38.1 seconds.
2. If you could re-do this project, what changes would you make during your timed trials to help your prediction for the final race?
Actually, I think I would make the trials have more tries instead of just getting the first result. Because (obviously) humans cannot walk at the same rate all the time, we need to find the average of multiple runs, say 10 runs. We should also average out the total rate (the mean of all 3 rates) so that we get an idea of how long it would take if the distance of the race track was split evenly between the 3 people.
3. What units of measure did you use during your timed trials? How important were units in your process? What happened to groups that didn’t include units on their paper?
We used s/m instead of the standard m/s. This is because it is easier to calculate time given distance. Because s/m is an unit ratio for seconds, we can just multiply the [seconds] part by the distance you have to go. Units were very important because 1 second and 1 minute is a very different thing and can totally mess your calculations if you don’t remember. To be completely honest, I have no idea what happened to the groups who didn’t use units.
————————————————————————————————————————————
And that’s all! Bye!