Newt’s Laws
This year in physical science, we
learned about Newton’s 3 laws of motion. The laws… they are honestly are kind of boring if you
are merely reading them. HOWEVER, there is hope! I’m going to clear up a few
things about Mr. Newt’s laws and show that he isn’t so BORING after all!
The
first law is: Every object in a state of uniform motion
tends to remain in that state of motion unless an external force is applied to
it. So let’s put some fun into
this. One day there was a boy named Angus. Angus was a pretty cool kid. The
other kids got jealous while they saw Angus running. They went up to him and
tripped him. YAY! That scenario shows the first law. “How?” you might ask?
Well, Angus was running and he was in a regular motion. His legs were
constantly putting each foot in front of each other. Then the kids came up and
stopped him; ladies and gentlemen, Newt’s first law.
Now for the second law: The relationship between an
object's mass m, its acceleration a, and the applied force F is F = ma.
Acceleration and force are vectors (as indicated by their symbols being
displayed in slant bold font); in this law the direction of the force vector is
the same as the direction of the acceleration vector. Phew, now that’s a mouthful! Some people summarize this by saying F=MA. Let me
show you how this actually makes sense. The let’s just say that Angus has a
mass of 55 kg. His mass and his acceleration, (acceleration is the rate
of change of velocity with time) are directly related to his force (strength or power
exerted upon an object). Make sense?
For the grand finale; THE THIRD
LAW! For every
action there is an equal and opposite reaction. Isn’t that nice… and little? Well it may be pretty clear and simple, so
I’m not going to make a story up; maybe this analogy from the Study Physics will help:
- If you push on a wall you feel a force against your hand… the wall is pushing back on you with as much force as you apply to it.
- If this wasn't happening, your hand would accelerate through the wall!
So
now for the personal stuff…
When learning about the laws, I
noticed that they way it was being taught was easier to understand than when I
was being taught it in 7nth grade. I studied by memorization and also thinking
of ridiculous stories (like Angus’s…). I honestly enjoyed studying Newton’s laws
because it was easyto learn and I have to thank my teacher for that. J
ANYWAYS,
enough of the mushy gushy stuff, study hall is almost over and I’m ready to go
home! Maybe I should use Newt’s first law to get out of this seat…
-Caitlin
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