Wednesday, June 22, 2011

Quarter 1!

My cousins (who are so cute) were playing this game where we would run onto a beach mat, and see how far we can make it travel once we land on it. We would run from any point we want but jump at the same point each time then land on a beach mat the same distance away, which is about 2-3 meters from the starting point. I think it was common sense that starting at a father point and running towards the start (accelerating) your speed would increase, thus causing you to land faster and have the mat go farther. If i were to set this up using a dt graph, the slope would be linear increasing each step forward, then once in the air there would be constant velocity until they hit the ground slowing down as they get further away. On a vt graph the line would increase in a straight line upwards then travel slower, so have the line decrease with time. The farther you start running, the more acceleration you get causing you to gain velocity/speed, then landing at a rast rate, but since the friction against the grass causes you to slow, you would still be accelerating but decreasing speed rather than increasing. A source of error could be improper placement of the mat, differences in weight, and inexact measurement. But in all, run faster, go father!

This goes a long with a lot of what we learned in kinematics with acceleration with motion. We learned about distance, velocity, original velocity, time, and units of each variable! We can find each one of these using the equations DVT, DAT, VAT, and VAD by plugging in the number we know and canceling out the units! We found out about gravity being about 9.8m/s and how objects at rest start with 0 m/s as their velocity. We also learned how to graph objects in three different ways, position and time (velocity), velocity and time (acceleration), and the area under a curve (displacement). SO many things have to do with physics in our daily lives! Its crazy!

2 comments:

  1. This is so cute and cool! I wish I could do something like this, but I think I'm too big. It looks like so much fun! This is what I call physics in everyday life! This is very awesome, and I like it a lot. Great job on your application of your physics knowledge; listing errors, predicting graphs, and describing motion. C:

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  2. Thanks Ari! Your blog was really informative!

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