In class, we learned how to use the kinematic equations to find final velocity, initial velocity, distance, acceleration or time. The kinematic equations are:
d = (average V)t – "d, v, t" equation
d = ½ at2 + Vot – "dat vot" equation
Vf = Vo + at – "Vat" equation
Vf2 = Vo2 + 2ad – "Vad" equation
When you are trying to find a variable you look at your givens and based on what you already know and what you need to find is how you choose what equation to use. For example, if you are trying to find the average velocity and you are given the distance and time you use the d, v, t graph. You put the given variables in the equation then divide the distance by the time and you get the average velocity.
This how kinematic equations can be used in everyday life, today I had to pick up mangoes that had fallen from the tree in my backyard. While I was picking each mango, another mango fell (almost landed on my foot and if it had my foot would have hurt, just a little, but it would also have squashed mango on it) and I guessed how many seconds it took to fall and I measured the distance from which it fell from. The distance between the branch and the ground was 3.5 meters and the mango fell to the ground in about 1 to 2 seconds so lets say it dropped at 1.5 seconds. With the given variables I want to find out what the average velocity is. So I use the "d, v, t" equation with d = 3.5 meters and t = 1.5 seconds. The average velocity is 2.3 m/s. Which makes sense, I guess…..
Hereʻs my mango tree, I could not take a photo of a mango dropping so, yeah, here is my enormous tree that makes so much rubbish its not funny.
Hereʻs my mango tree, I could not take a photo of a mango dropping so, yeah, here is my enormous tree that makes so much rubbish its not funny.
this was interesting, i like how u made a review then applied it to mango picking. but maybe it took 1 second ish to fall? 4 seconds is a lot!
ReplyDeleteyeah, i thought about it again and had my cousin drop another one and it was almost 2 seconds.
ReplyDeleteThis is a super good example! One thing I might add is the equation that you used and show how you plugged in your numbers to show how to use the equations and when to use the appropriate ones. Great idea!
ReplyDeletethanks kaheke, iʻll add that right now.
ReplyDelete